51231079 has 4 divisors (see below), whose sum is σ = 51268360. Its totient is φ = 51193800.

The previous prime is 51231073. The next prime is 51231083. The reversal of 51231079 is 97013215.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 51231079 - 2⁷ = 51230951 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51231073) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16497 + ... + 19354.

It is an arithmetic number, because the mean of its divisors is an integer number (12817090).

Almost surely, 2^51231079 is an apocalyptic number.

51231079 is a deficient number, since it is larger than the sum of its proper divisors (37281).

51231079 is a wasteful number, since it uses less digits than its factorization.

51231079 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37280.

The product of its (nonzero) digits is 1890, while the sum is 28.

The square root of 51231079 is about 7157.5889096818. The cubic root of 51231079 is about 371.4022247936.

The spelling of 51231079 in words is "fifty-one million, two hundred thirty-one thousand, seventy-nine".