251212052442130 has 96 divisors (see below), whose sum is σ = 507056289014160. Its totient is φ = 89462773370880.

The previous prime is 251212052442107. The next prime is 251212052442133. The reversal of 251212052442130 is 31244250212152.

It can be written as a sum of positive squares in 24 ways, for example, as 39046289182209 + 212165763259921 = 6248703^2 + 14565911^2 .

It is not an unprimeable number, because it can be changed into a prime (251212052442133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 44017270 + ... + 49395790.

Almost surely, 2^{251212052442130} is an apocalyptic number.

251212052442130 is an abundant number, since it is smaller than the sum of its proper divisors (255844236572030).

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

251212052442130 is a wasteful number, since it uses less digits than its factorization.

251212052442130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5379536 (or 5379523 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 34.

The spelling of 251212052442130 in words is "two hundred fifty-one trillion, two hundred twelve billion, fifty-two million, four hundred forty-two thousand, one hundred thirty".