23220313551445 has 4 divisors (see below), whose sum is σ = 27864376261740. Its totient is φ = 18576250841152.

The previous prime is 23220313551371. The next prime is 23220313551509. The reversal of 23220313551445 is 54415531302232.

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 4017066164644 + 19203247386801 = 2004262^2 + 4382151^2 .

It is a cyclic number.

It is not a de Polignac number, because 23220313551445 - 2⁹ = 23220313550933 is a prime.

It is a super-2 number, since 2×23220313551445² (a number of 28 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 23220313551398 and 23220313551407.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2322031355140 + ... + 2322031355149.

It is an arithmetic number, because the mean of its divisors is an integer number (6966094065435).

Almost surely, 2^{23220313551445} is an apocalyptic number.

It is an amenable number.

23220313551445 is a deficient number, since it is larger than the sum of its proper divisors (4644062710295).

23220313551445 is an equidigital number, since it uses as much as digits as its factorization.

23220313551445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4644062710294.

The product of its (nonzero) digits is 432000, while the sum is 40.

Adding to 23220313551445 its reverse (54415531302232), we get a palindrome (77635844853677).

The spelling of 23220313551445 in words is "twenty-three trillion, two hundred twenty billion, three hundred thirteen million, five hundred fifty-one thousand, four hundred forty-five".