251193061 has 12 divisors (see below), whose sum is σ = 295907520. Its totient is φ = 212579640.

The previous prime is 251193049. The next prime is 251193079. The reversal of 251193061 is 160391152.

It is not a de Polignac number, because 251193061 - 2⁷ = 251192933 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (251193361) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28575 + ... + 36316.

It is an arithmetic number, because the mean of its divisors is an integer number (24658960).

Almost surely, 2^251193061 is an apocalyptic number.

It is an amenable number.

251193061 is a deficient number, since it is larger than the sum of its proper divisors (44714459).

251193061 is an equidigital number, since it uses as much as digits as its factorization.

251193061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64984 (or 64977 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 28.

The square root of 251193061 is about 15849.0712977133. The cubic root of 251193061 is about 630.9610435035.

The spelling of 251193061 in words is "two hundred fifty-one million, one hundred ninety-three thousand, sixty-one".