251478063 has 6 divisors (see below), whose sum is σ = 363246104. Its totient is φ = 167652036.

The previous prime is 251478043. The next prime is 251478079. The reversal of 251478063 is 360874152.

251478063 is a `hidden beast` number, since 2 + 514 + 7 + 80 + 63 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-251478063 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 (251478023) 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, 13970995 + ... + 13971012.

Almost surely, 2^251478063 is an apocalyptic number.

251478063 is a deficient number, since it is larger than the sum of its proper divisors (111768041).

251478063 is a wasteful number, since it uses less digits than its factorization.

251478063 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27942013 (or 27942010 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 36.

The square root of 251478063 is about 15858.0598750288. The cubic root of 251478063 is about 631.1995813994.

The spelling of 251478063 in words is "two hundred fifty-one million, four hundred seventy-eight thousand, sixty-three".