51893907 has 16 divisors (see below), whose sum is σ = 76919808. Its totient is φ = 30903840.

The previous prime is 51893903. The next prime is 51893917. The reversal of 51893907 is 70939815.

It is a happy number.

It is not a de Polignac number, because 51893907 - 2² = 51893903 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51893903) 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, 20253 + ... + 22670.

It is an arithmetic number, because the mean of its divisors is an integer number (4807488).

Almost surely, 2^51893907 is an apocalyptic number.

51893907 is a deficient number, since it is larger than the sum of its proper divisors (25025901).

51893907 is a wasteful number, since it uses less digits than its factorization.

51893907 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42970.

The product of its (nonzero) digits is 68040, while the sum is 42.

The square root of 51893907 is about 7203.7425689707. The cubic root of 51893907 is about 372.9971009892.

The spelling of 51893907 in words is "fifty-one million, eight hundred ninety-three thousand, nine hundred seven".