51640762 has 8 divisors (see below), whose sum is σ = 78922836. Its totient is φ = 25333152.

The previous prime is 51640751. The next prime is 51640783. The reversal of 51640762 is 26704615.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 46936201 + 4704561 = 6851^2 + 2169^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 243483 + ... + 243694.

Almost surely, 2^51640762 is an apocalyptic number.

51640762 is a deficient number, since it is larger than the sum of its proper divisors (27282074).

51640762 is a wasteful number, since it uses less digits than its factorization.

51640762 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 487232.

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 51640762 is about 7186.1507081330. The cubic root of 51640762 is about 372.3896031875.

The spelling of 51640762 in words is "fifty-one million, six hundred forty thousand, seven hundred sixty-two".