251153130525 has 24 divisors (see below), whose sum is σ = 452988920544. Its totient is φ = 121771214400.

The previous prime is 251153130509. The next prime is 251153130541. The reversal of 251153130525 is 525031351152.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (251153130509) and next prime (251153130541).

It is not a de Polignac number, because 251153130525 - 2⁴ = 251153130509 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 152213194 + ... + 152214843.

It is an arithmetic number, because the mean of its divisors is an integer number (18874538356).

Almost surely, 2^251153130525 is an apocalyptic number.

251153130525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

251153130525 is a deficient number, since it is larger than the sum of its proper divisors (201835790019).

251153130525 is a wasteful number, since it uses less digits than its factorization.

251153130525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 304428061 (or 304428056 counting only the distinct ones).

The product of its (nonzero) digits is 22500, while the sum is 33.

Adding to 251153130525 its reverse (525031351152), we get a palindrome (776184481677).

The spelling of 251153130525 in words is "two hundred fifty-one billion, one hundred fifty-three million, one hundred thirty thousand, five hundred twenty-five".