51663357 has 12 divisors (see below), whose sum is σ = 79014780. Its totient is φ = 32416128.

The previous prime is 51663347. The next prime is 51663371. The reversal of 51663357 is 75336615.

It is a happy number.

51663357 is a `hidden beast` number, since 5 + 16 + 633 + 5 + 7 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 42263001 + 9400356 = 6501^2 + 3066^2 .

It is not a de Polignac number, because 51663357 - 2⁷ = 51663229 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51663307) 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, 168682 + ... + 168987.

It is an arithmetic number, because the mean of its divisors is an integer number (6584565).

Almost surely, 2^51663357 is an apocalyptic number.

It is an amenable number.

51663357 is a deficient number, since it is larger than the sum of its proper divisors (27351423).

51663357 is a wasteful number, since it uses less digits than its factorization.

51663357 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 337692 (or 337689 counting only the distinct ones).

The product of its digits is 56700, while the sum is 36.

The square root of 51663357 is about 7187.7226574208. The cubic root of 51663357 is about 372.4439072933.

The spelling of 51663357 in words is "fifty-one million, six hundred sixty-three thousand, three hundred fifty-seven".