251116073 has 8 divisors (see below), whose sum is σ = 271441800. Its totient is φ = 230934528.

The previous prime is 251116043. The next prime is 251116091. The reversal of 251116073 is 370611152.

It can be written as a sum of positive squares in 4 ways, for example, as 19254544 + 231861529 = 4388^2 + 15227^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 251116073 - 2⁶ = 251116009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (251116043) 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, 32408 + ... + 39401.

It is an arithmetic number, because the mean of its divisors is an integer number (33930225).

Almost surely, 2^251116073 is an apocalyptic number.

It is an amenable number.

251116073 is a deficient number, since it is larger than the sum of its proper divisors (20325727).

251116073 is a wasteful number, since it uses less digits than its factorization.

251116073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72091.

The product of its (nonzero) digits is 1260, while the sum is 26.

The square root of 251116073 is about 15846.6423257421. The cubic root of 251116073 is about 630.8965759685.

The spelling of 251116073 in words is "two hundred fifty-one million, one hundred sixteen thousand, seventy-three".