51485994 has 48 divisors (see below), whose sum is σ = 127932480. Its totient is φ = 14659200.

The previous prime is 51485977. The next prime is 51486053. The reversal of 51485994 is 49958415.

51485994 is a `hidden beast` number, since 51 + 4 + 8 + 599 + 4 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 50017 + ... + 51035.

It is an arithmetic number, because the mean of its divisors is an integer number (2665260).

Almost surely, 2^51485994 is an apocalyptic number.

51485994 is an abundant number, since it is smaller than the sum of its proper divisors (76446486).

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

51485994 is a wasteful number, since it uses less digits than its factorization.

51485994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1435 (or 1432 counting only the distinct ones).

The product of its digits is 259200, while the sum is 45.

The square root of 51485994 is about 7175.3741365869. The cubic root of 51485994 is about 372.0172121762.

The spelling of 51485994 in words is "fifty-one million, four hundred eighty-five thousand, nine hundred ninety-four".