23161315651 has 4 divisors (see below), whose sum is σ = 23162835904. Its totient is φ = 23159795400.

The previous prime is 23161315637. The next prime is 23161315673. The reversal of 23161315651 is 15651316132.

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

It is a cyclic number.

It is not a de Polignac number, because 23161315651 - 2¹⁹ = 23160791363 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23161315631) 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, 737040 + ... + 767821.

It is an arithmetic number, because the mean of its divisors is an integer number (5790708976).

Almost surely, 2^23161315651 is an apocalyptic number.

23161315651 is a deficient number, since it is larger than the sum of its proper divisors (1520253).

23161315651 is a wasteful number, since it uses less digits than its factorization.

23161315651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1520252.

The product of its digits is 16200, while the sum is 34.

The spelling of 23161315651 in words is "twenty-three billion, one hundred sixty-one million, three hundred fifteen thousand, six hundred fifty-one".