51397604 has 6 divisors (see below), whose sum is σ = 89945814. Its totient is φ = 25698800.

The previous prime is 51397601. The next prime is 51397607. The reversal of 51397604 is 40679315.

It is an interprime number because it is at equal distance from previous prime (51397601) and next prime (51397607).

It can be written as a sum of positive squares in only one way, i.e., 45589504 + 5808100 = 6752^2 + 2410^2 .

It is a super-3 number, since 3×51397604³ (a number of 24 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (51397601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6424697 + ... + 6424704.

It is an arithmetic number, because the mean of its divisors is an integer number (14990969).

Almost surely, 2^51397604 is an apocalyptic number.

It is an amenable number.

51397604 is a deficient number, since it is larger than the sum of its proper divisors (38548210).

51397604 is a wasteful number, since it uses less digits than its factorization.

51397604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12849405 (or 12849403 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 35.

The square root of 51397604 is about 7169.2122300850. The cubic root of 51397604 is about 371.8041999621.

The spelling of 51397604 in words is "fifty-one million, three hundred ninety-seven thousand, six hundred four".