251411201135220 has 96 divisors (see below), whose sum is σ = 812481347172096. Its totient is φ = 56896452864000.

The previous prime is 251411201135177. The next prime is 251411201135273. The reversal of 251411201135220 is 22531102114152.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2963314501 + ... + 2963399340.

It is an arithmetic number, because the mean of its divisors is an integer number (8463347366376).

Almost surely, 2^{251411201135220} is an apocalyptic number.

251411201135220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

251411201135220 is an abundant number, since it is smaller than the sum of its proper divisors (561070146036876).

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

251411201135220 is a wasteful number, since it uses less digits than its factorization.

251411201135220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5926713961 (or 5926713959 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 30.

Adding to 251411201135220 its reverse (22531102114152), we get a palindrome (273942303249372).

The spelling of 251411201135220 in words is "two hundred fifty-one trillion, four hundred eleven billion, two hundred one million, one hundred thirty-five thousand, two hundred twenty".