251200351420 has 48 divisors (see below), whose sum is σ = 563675777280. Its totient is φ = 93701919744.

The previous prime is 251200351411. The next prime is 251200351427. The reversal of 251200351420 is 24153002152.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (251200351427) 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, 3352044 + ... + 3426163.

It is an arithmetic number, because the mean of its divisors is an integer number (11743245360).

Almost surely, 2^251200351420 is an apocalyptic number.

251200351420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

251200351420 is an abundant number, since it is smaller than the sum of its proper divisors (312475425860).

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

251200351420 is a wasteful number, since it uses less digits than its factorization.

251200351420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6778342 (or 6778340 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

Adding to 251200351420 its reverse (24153002152), we get a palindrome (275353353572).

The spelling of 251200351420 in words is "two hundred fifty-one billion, two hundred million, three hundred fifty-one thousand, four hundred twenty".