51558016 has 16 divisors (see below), whose sum is σ = 102713490. Its totient is φ = 25778944.

The previous prime is 51557941. The next prime is 51558037. The reversal of 51558016 is 61085515.

It can be written as a sum of positive squares in only one way, i.e., 28132416 + 23425600 = 5304^2 + 4840^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201271 + ... + 201526.

Almost surely, 2^51558016 is an apocalyptic number.

It is an amenable number.

51558016 is a deficient number, since it is larger than the sum of its proper divisors (51155474).

51558016 is an equidigital number, since it uses as much as digits as its factorization.

51558016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 402811 (or 402799 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 31.

The square root of 51558016 is about 7180.3910757005. The cubic root of 51558016 is about 372.1905987473.

The spelling of 51558016 in words is "fifty-one million, five hundred fifty-eight thousand, sixteen".