51564030 has 64 divisors (see below), whose sum is σ = 146327040. Its totient is φ = 11378304.

The previous prime is 51563989. The next prime is 51564031. The reversal of 51564030 is 3046515.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51564031) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1857 + ... + 10323.

It is an arithmetic number, because the mean of its divisors is an integer number (2286360).

Almost surely, 2^51564030 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51564030, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (73163520).

51564030 is an abundant number, since it is smaller than the sum of its proper divisors (94763010).

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

51564030 is a wasteful number, since it uses less digits than its factorization.

51564030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8513.

The product of its (nonzero) digits is 1800, while the sum is 24.

The square root of 51564030 is about 7180.8098429077. The cubic root of 51564030 is about 372.2050696121.

The spelling of 51564030 in words is "fifty-one million, five hundred sixty-four thousand, thirty".