51263506 has 12 divisors (see below), whose sum is σ = 89449758. Its totient is φ = 21970032.

The previous prime is 51263479. The next prime is 51263519. The reversal of 51263506 is 60536215.

It can be written as a sum of positive squares in only one way, i.e., 48511225 + 2752281 = 6965^2 + 1659^2 .

It is a super-3 number, since 3×51263506³ (a number of 24 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 261451 + ... + 261646.

Almost surely, 2^51263506 is an apocalyptic number.

51263506 is a deficient number, since it is larger than the sum of its proper divisors (38186252).

51263506 is a wasteful number, since it uses less digits than its factorization.

51263506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 523113 (or 523106 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 28.

The square root of 51263506 is about 7159.8537694565. The cubic root of 51263506 is about 371.4805686432.

The spelling of 51263506 in words is "fifty-one million, two hundred sixty-three thousand, five hundred six".