213405637925 has 12 divisors (see below), whose sum is σ = 268572590016. Its totient is φ = 168176382000.

The previous prime is 213405637867. The next prime is 213405637937. The reversal of 213405637925 is 529736504312.

It is not a de Polignac number, because 213405637925 - 2²⁸ = 213137202469 is a prime.

It is a hoax number, since the sum of its digits (47) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 213405637925.

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, 63701501 + ... + 63704850.

It is an arithmetic number, because the mean of its divisors is an integer number (22381049168).

Almost surely, 2^213405637925 is an apocalyptic number.

213405637925 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

213405637925 is a deficient number, since it is larger than the sum of its proper divisors (55166952091).

213405637925 is a wasteful number, since it uses less digits than its factorization.

213405637925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127406428 (or 127406423 counting only the distinct ones).

The product of its (nonzero) digits is 1360800, while the sum is 47.

The spelling of 213405637925 in words is "two hundred thirteen billion, four hundred five million, six hundred thirty-seven thousand, nine hundred twenty-five".