23151515507 has 2 divisors, whose sum is σ = 23151515508. Its totient is φ = 23151515506.

The previous prime is 23151515503. The next prime is 23151515521. The reversal of 23151515507 is 70551515132.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 23151515507 - 2² = 23151515503 is a prime.

It is a super-2 number, since 2×23151515507² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (23151515503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11575757753 + 11575757754.

It is an arithmetic number, because the mean of its divisors is an integer number (11575757754).

Almost surely, 2^23151515507 is an apocalyptic number.

23151515507 is a deficient number, since it is larger than the sum of its proper divisors (1).

23151515507 is an equidigital number, since it uses as much as digits as its factorization.

23151515507 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 26250, while the sum is 35.

The spelling of 23151515507 in words is "twenty-three billion, one hundred fifty-one million, five hundred fifteen thousand, five hundred seven".