251002401400530 has 192 divisors, whose sum is σ = 704511203655168. Its totient is φ = 61635437360640.

The previous prime is 251002401400477. The next prime is 251002401400601. The reversal of 251002401400530 is 35004104200152.

251002401400530 is a `hidden beast` number, since 2 + 5 + 10 + 0 + 240 + 1 + 400 + 5 + 3 + 0 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 251002401400494 and 251002401400503.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1983878832 + ... + 1984005348.

It is an arithmetic number, because the mean of its divisors is an integer number (3669329185704).

Almost surely, 2^{251002401400530} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 251002401400530, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (352255601827584).

251002401400530 is an abundant number, since it is smaller than the sum of its proper divisors (453508802254638).

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

251002401400530 is a wasteful number, since it uses less digits than its factorization.

251002401400530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130641 (or 130638 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

Adding to 251002401400530 its reverse (35004104200152), we get a palindrome (286006505600682).

The spelling of 251002401400530 in words is "two hundred fifty-one trillion, two billion, four hundred one million, four hundred thousand, five hundred thirty".