251425663 has 8 divisors (see below), whose sum is σ = 254494080. Its totient is φ = 248368800.

The previous prime is 251425639. The next prime is 251425703. The reversal of 251425663 is 366524152.

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 251425663 - 2¹⁷ = 251294591 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 (251425463) 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, 45781 + ... + 50977.

It is an arithmetic number, because the mean of its divisors is an integer number (31811760).

Almost surely, 2^251425663 is an apocalyptic number.

251425663 is a deficient number, since it is larger than the sum of its proper divisors (3068417).

251425663 is a wasteful number, since it uses less digits than its factorization.

251425663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5777.

The product of its digits is 43200, while the sum is 34.

The square root of 251425663 is about 15856.4076322476. The cubic root of 251425663 is about 631.1557377400.

The spelling of 251425663 in words is "two hundred fifty-one million, four hundred twenty-five thousand, six hundred sixty-three".