51499994 has 64 divisors (see below), whose sum is σ = 102332160. Its totient is φ = 18869760.

The previous prime is 51499963. The next prime is 51499997. The reversal of 51499994 is 49999415.

It is not an unprimeable number, because it can be changed into a prime (51499997) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 183134 + ... + 183414.

It is an arithmetic number, because the mean of its divisors is an integer number (1598940).

Almost surely, 2^51499994 is an apocalyptic number.

51499994 is a deficient number, since it is larger than the sum of its proper divisors (50832166).

51499994 is a wasteful number, since it uses less digits than its factorization.

51499994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 375.

The product of its digits is 524880, while the sum is 50.

The square root of 51499994 is about 7176.3496291638. The cubic root of 51499994 is about 372.0509285883.

The spelling of 51499994 in words is "fifty-one million, four hundred ninety-nine thousand, nine hundred ninety-four".