251345200404 has 48 divisors (see below), whose sum is σ = 606785699520. Its totient is φ = 80880656640.

The previous prime is 251345200369. The next prime is 251345200409. The reversal of 251345200404 is 404002543152.

It is a super-2 number, since 2×251345200404² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (251345200409) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2452959 + ... + 2553369.

It is an arithmetic number, because the mean of its divisors is an integer number (12641368740).

Almost surely, 2^251345200404 is an apocalyptic number.

It is an amenable number.

251345200404 is an abundant number, since it is smaller than the sum of its proper divisors (355440499116).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

251345200404 is a wasteful number, since it uses less digits than its factorization.

251345200404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107640 (or 107638 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 30.

Adding to 251345200404 its reverse (404002543152), we get a palindrome (655347743556).

The spelling of 251345200404 in words is "two hundred fifty-one billion, three hundred forty-five million, two hundred thousand, four hundred four".