251080601 has 4 divisors (see below), whose sum is σ = 251694900. Its totient is φ = 250466304.

The previous prime is 251080591. The next prime is 251080619. The reversal of 251080601 is 106080152.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 220819600 + 30261001 = 14860^2 + 5501^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-251080601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (251080001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 306536 + ... + 307353.

It is an arithmetic number, because the mean of its divisors is an integer number (62923725).

Almost surely, 2^251080601 is an apocalyptic number.

It is an amenable number.

251080601 is a deficient number, since it is larger than the sum of its proper divisors (614299).

251080601 is an equidigital number, since it uses as much as digits as its factorization.

251080601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 614298.

The product of its (nonzero) digits is 480, while the sum is 23.

The square root of 251080601 is about 15845.5230585803. The cubic root of 251080601 is about 630.8668683026.

The spelling of 251080601 in words is "two hundred fifty-one million, eighty thousand, six hundred one".