51415994 has 24 divisors (see below), whose sum is σ = 93620448. Its totient is φ = 21076440.

The previous prime is 51415993. The next prime is 51416023. The reversal of 51415994 is 49951415.

It is not an unprimeable number, because it can be changed into a prime (51415993) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9152 + ... + 13659.

It is an arithmetic number, because the mean of its divisors is an integer number (3900852).

Almost surely, 2^51415994 is an apocalyptic number.

51415994 is a deficient number, since it is larger than the sum of its proper divisors (42204454).

51415994 is a wasteful number, since it uses less digits than its factorization.

51415994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22850 (or 22843 counting only the distinct ones).

The product of its digits is 32400, while the sum is 38.

The square root of 51415994 is about 7170.4946830745. The cubic root of 51415994 is about 371.8485383709.

The spelling of 51415994 in words is "fifty-one million, four hundred fifteen thousand, nine hundred ninety-four".