51259636 has 12 divisors (see below), whose sum is σ = 89907300. Its totient is φ = 25571840.

The previous prime is 51259633. The next prime is 51259643. The reversal of 51259636 is 63695215.

It can be written as a sum of positive squares in 2 ways, for example, as 21622500 + 29637136 = 4650^2 + 5444^2 .

It is a junction number, because it is equal to n+sod(n) for n = 51259595 and 51259604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51259633) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12475 + ... + 16066.

It is an arithmetic number, because the mean of its divisors is an integer number (7492275).

Almost surely, 2^51259636 is an apocalyptic number.

It is an amenable number.

51259636 is a deficient number, since it is larger than the sum of its proper divisors (38647664).

51259636 is a wasteful number, since it uses less digits than its factorization.

51259636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28994 (or 28992 counting only the distinct ones).

The product of its digits is 48600, while the sum is 37.

The square root of 51259636 is about 7159.5835074395. The cubic root of 51259636 is about 371.4712204338.

The spelling of 51259636 in words is "fifty-one million, two hundred fifty-nine thousand, six hundred thirty-six".