51564130 has 8 divisors (see below), whose sum is σ = 92815452. Its totient is φ = 20625648.

The previous prime is 51564127. The next prime is 51564131. The reversal of 51564130 is 3146515.

It can be written as a sum of positive squares in 2 ways, for example, as 47734281 + 3829849 = 6909^2 + 1957^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 51564095 and 51564104.

It is not an unprimeable number, because it can be changed into a prime (51564131) 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, 2578197 + ... + 2578216.

Almost surely, 2^51564130 is an apocalyptic number.

51564130 is a deficient number, since it is larger than the sum of its proper divisors (41251322).

51564130 is a wasteful number, since it uses less digits than its factorization.

51564130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5156420.

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 51564130 is about 7180.8168059072. The cubic root of 51564130 is about 372.2053102223.

The spelling of 51564130 in words is "fifty-one million, five hundred sixty-four thousand, one hundred thirty".