51894906 has 16 divisors (see below), whose sum is σ = 118617024. Its totient is φ = 14827104.

The previous prime is 51894881. The next prime is 51894907. The reversal of 51894906 is 60949815.

It is a Harshad number since it is a multiple of its sum of digits (42), and also a Moran number because the ratio is a prime number: 1235593 = 51894906 / (5 + 1 + 8 + 9 + 4 + 9 + 0 + 6).

It is not an unprimeable number, because it can be changed into a prime (51894907) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 617755 + ... + 617838.

It is an arithmetic number, because the mean of its divisors is an integer number (7413564).

Almost surely, 2^51894906 is an apocalyptic number.

51894906 is an abundant number, since it is smaller than the sum of its proper divisors (66722118).

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

51894906 is a wasteful number, since it uses less digits than its factorization.

51894906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1235605.

The product of its (nonzero) digits is 77760, while the sum is 42.

The square root of 51894906 is about 7203.8119075945. The cubic root of 51894906 is about 372.9994944733. Note that the first 3 decimals are identical.

The spelling of 51894906 in words is "fifty-one million, eight hundred ninety-four thousand, nine hundred six".