23513211250 has 20 divisors (see below), whose sum is σ = 44073165510. Its totient is φ = 9405284000.

The previous prime is 23513211247. The next prime is 23513211257. The reversal of 23513211250 is 5211231532.

It can be written as a sum of positive squares in 5 ways, for example, as 116143729 + 23397067521 = 10777^2 + 152961^2 .

It is a super-2 number, since 2×23513211250² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is not an unprimeable number, because it can be changed into a prime (23513211257) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 9404035 + ... + 9406534.

Almost surely, 2^23513211250 is an apocalyptic number.

23513211250 is a deficient number, since it is larger than the sum of its proper divisors (20559954260).

23513211250 is an equidigital number, since it uses as much as digits as its factorization.

23513211250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18810591 (or 18810576 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 25.

Adding to 23513211250 its reverse (5211231532), we get a palindrome (28724442782).

The spelling of 23513211250 in words is "twenty-three billion, five hundred thirteen million, two hundred eleven thousand, two hundred fifty".