51348636 has 36 divisors (see below), whose sum is σ = 137434752. Its totient is φ = 16109184.

The previous prime is 51348629. The next prime is 51348677. The reversal of 51348636 is 63684315.

51348636 is a `hidden beast` number, since 5 + 13 + 4 + 8 + 636 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 51348636.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 41340 + ... + 42563.

It is an arithmetic number, because the mean of its divisors is an integer number (3817632).

Almost surely, 2^51348636 is an apocalyptic number.

It is an amenable number.

51348636 is an abundant number, since it is smaller than the sum of its proper divisors (86086116).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51348636 is a wasteful number, since it uses less digits than its factorization.

51348636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83930 (or 83925 counting only the distinct ones).

The product of its digits is 51840, while the sum is 36.

The square root of 51348636 is about 7165.7962572208. The cubic root of 51348636 is about 371.6860862002.

It can be divided in two parts, 51348 and 636, that added together give a square (51984 = 228²).

The spelling of 51348636 in words is "fifty-one million, three hundred forty-eight thousand, six hundred thirty-six".