23021151354451 has 4 divisors (see below), whose sum is σ = 23021211838504. Its totient is φ = 23021090870400.

The previous prime is 23021151354427. The next prime is 23021151354479. The reversal of 23021151354451 is 15445315112032.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23021151354451 is a prime.

It is a super-2 number, since 2×23021151354451² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 23021151354451.

It is not an unprimeable number, because it can be changed into a prime (23021151654451) 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, 29667465 + ... + 30433546.

It is an arithmetic number, because the mean of its divisors is an integer number (5755302959626).

Almost surely, 2^{23021151354451} is an apocalyptic number.

23021151354451 is a deficient number, since it is larger than the sum of its proper divisors (60484053).

23021151354451 is an equidigital number, since it uses as much as digits as its factorization.

23021151354451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60484052.

The product of its (nonzero) digits is 72000, while the sum is 37.

Adding to 23021151354451 its reverse (15445315112032), we get a palindrome (38466466466483).

The spelling of 23021151354451 in words is "twenty-three trillion, twenty-one billion, one hundred fifty-one million, three hundred fifty-four thousand, four hundred fifty-one".