23220351230501 has 4 divisors (see below), whose sum is σ = 24021052997100. Its totient is φ = 22419649463904.

The previous prime is 23220351230437. The next prime is 23220351230551. The reversal of 23220351230501 is 10503215302232.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7548261708100 + 15672089522401 = 2747410^2 + 3958799^2 .

It is a cyclic number.

It is not a de Polignac number, because 23220351230501 - 2⁶ = 23220351230437 is a prime.

It is a super-2 number, since 2×23220351230501² (a number of 28 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (29), and also a Moran number because the ratio is a prime number: 800701766569 = 23220351230501 / (2 + 3 + 2 + 2 + 0 + 3 + 5 + 1 + 2 + 3 + 0 + 5 + 0 + 1).

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23220351230551) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 400350883256 + ... + 400350883313.

It is an arithmetic number, because the mean of its divisors is an integer number (6005263249275).

Almost surely, 2^{23220351230501} is an apocalyptic number.

It is an amenable number.

23220351230501 is a deficient number, since it is larger than the sum of its proper divisors (800701766599).

23220351230501 is an equidigital number, since it uses as much as digits as its factorization.

23220351230501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 800701766598.

The product of its (nonzero) digits is 10800, while the sum is 29.

Adding to 23220351230501 its reverse (10503215302232), we get a palindrome (33723566532733).

The spelling of 23220351230501 in words is "twenty-three trillion, two hundred twenty billion, three hundred fifty-one million, two hundred thirty thousand, five hundred one".