251076401 has 8 divisors (see below), whose sum is σ = 252698664. Its totient is φ = 249459840.

The previous prime is 251076389. The next prime is 251076421. The reversal of 251076401 is 104670152.

It can be written as a sum of positive squares in 4 ways, for example, as 37945600 + 213130801 = 6160^2 + 14599^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-251076401 is a prime.

It is a super-2 number, since 2×251076401² = 126078718278225602, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (251076421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 115541 + ... + 117693.

It is an arithmetic number, because the mean of its divisors is an integer number (31587333).

Almost surely, 2^251076401 is an apocalyptic number.

It is an amenable number.

251076401 is a deficient number, since it is larger than the sum of its proper divisors (1622263).

251076401 is a wasteful number, since it uses less digits than its factorization.

251076401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2851.

The product of its (nonzero) digits is 1680, while the sum is 26.

The square root of 251076401 is about 15845.3905284786. The cubic root of 251076401 is about 630.8633506333.

The spelling of 251076401 in words is "two hundred fifty-one million, seventy-six thousand, four hundred one".