51631226 has 4 divisors (see below), whose sum is σ = 77446842. Its totient is φ = 25815612.

The previous prime is 51631219. The next prime is 51631231. The reversal of 51631226 is 62213615.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 42237001 + 9394225 = 6499^2 + 3065^2 .

It is a junction number, because it is equal to n+sod(n) for n = 51631195 and 51631204.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12907805 + ... + 12907808.

Almost surely, 2^51631226 is an apocalyptic number.

51631226 is a deficient number, since it is larger than the sum of its proper divisors (25815616).

51631226 is a wasteful number, since it uses less digits than its factorization.

51631226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25815615.

The product of its digits is 2160, while the sum is 26.

The square root of 51631226 is about 7185.4871790297. The cubic root of 51631226 is about 372.3666799145.

The spelling of 51631226 in words is "fifty-one million, six hundred thirty-one thousand, two hundred twenty-six".