51166980 has 36 divisors (see below), whose sum is σ = 155207052. Its totient is φ = 13644480.

The previous prime is 51166949. The next prime is 51167063. The reversal of 51166980 is 8966115.

51166980 is a `hidden beast` number, since 511 + 6 + 69 + 80 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 19289664 + 31877316 = 4392^2 + 5646^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 141951 + ... + 142310.

It is an arithmetic number, because the mean of its divisors is an integer number (4311307).

Almost surely, 2^51166980 is an apocalyptic number.

It is an amenable number.

51166980 is an abundant number, since it is smaller than the sum of its proper divisors (104040072).

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

51166980 is a wasteful number, since it uses less digits than its factorization.

51166980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 284276 (or 284271 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 36.

The square root of 51166980 is about 7153.1098132211. The cubic root of 51166980 is about 371.2472638645.

The spelling of 51166980 in words is "fifty-one million, one hundred sixty-six thousand, nine hundred eighty".