51393974 has 32 divisors (see below), whose sum is σ = 84780000. Its totient is φ = 23272704.

The previous prime is 51393959. The next prime is 51393977. The reversal of 51393974 is 47939315.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51393977) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 164042 + ... + 164354.

It is an arithmetic number, because the mean of its divisors is an integer number (2649375).

Almost surely, 2^51393974 is an apocalyptic number.

51393974 is a deficient number, since it is larger than the sum of its proper divisors (33386026).

51393974 is a wasteful number, since it uses less digits than its factorization.

51393974 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 512.

The product of its digits is 102060, while the sum is 41.

The square root of 51393974 is about 7168.9590597241. The cubic root of 51393974 is about 371.7954467589.

The spelling of 51393974 in words is "fifty-one million, three hundred ninety-three thousand, nine hundred seventy-four".