251277428201 has 6 divisors (see below), whose sum is σ = 257555628606. Its totient is φ = 245148708800.

The previous prime is 251277428189. The next prime is 251277428209. The reversal of 251277428201 is 102824772152.

It can be written as a sum of positive squares in 3 ways, for example, as 12375450025 + 238901978176 = 111245^2 + 488776^2 .

It is not a de Polignac number, because 251277428201 - 2⁶ = 251277428137 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (251277428209) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 74738780 + ... + 74742141.

It is an arithmetic number, because the mean of its divisors is an integer number (42925938101).

Almost surely, 2^251277428201 is an apocalyptic number.

It is an amenable number.

251277428201 is a deficient number, since it is larger than the sum of its proper divisors (6278200405).

251277428201 is an equidigital number, since it uses as much as digits as its factorization.

251277428201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149481003 (or 149480962 counting only the distinct ones).

The product of its (nonzero) digits is 125440, while the sum is 41.

The spelling of 251277428201 in words is "two hundred fifty-one billion, two hundred seventy-seven million, four hundred twenty-eight thousand, two hundred one".