23505543525 has 12 divisors (see below), whose sum is σ = 38862498752. Its totient is φ = 12536289840.

The previous prime is 23505543497. The next prime is 23505543547. The reversal of 23505543525 is 52534550532.

It is a happy number.

It is not a de Polignac number, because 23505543525 - 2¹² = 23505539429 is a prime.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 156703549 + ... + 156703698.

Almost surely, 2^23505543525 is an apocalyptic number.

23505543525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

23505543525 is a deficient number, since it is larger than the sum of its proper divisors (15356955227).

23505543525 is a wasteful number, since it uses less digits than its factorization.

23505543525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 313407260 (or 313407255 counting only the distinct ones).

The product of its (nonzero) digits is 450000, while the sum is 39.

The spelling of 23505543525 in words is "twenty-three billion, five hundred five million, five hundred forty-three thousand, five hundred twenty-five".