51399164 has 6 divisors (see below), whose sum is σ = 89948544. Its totient is φ = 25699580.

The previous prime is 51399157. The next prime is 51399169. The reversal of 51399164 is 46199315.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51399169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6424892 + ... + 6424899.

It is an arithmetic number, because the mean of its divisors is an integer number (14991424).

Almost surely, 2^51399164 is an apocalyptic number.

It is an amenable number.

51399164 is a deficient number, since it is larger than the sum of its proper divisors (38549380).

51399164 is a wasteful number, since it uses less digits than its factorization.

51399164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12849795 (or 12849793 counting only the distinct ones).

The product of its digits is 29160, while the sum is 38.

The square root of 51399164 is about 7169.3210278240. The cubic root of 51399164 is about 371.8079615427.

The spelling of 51399164 in words is "fifty-one million, three hundred ninety-nine thousand, one hundred sixty-four".