51031005 has 16 divisors (see below), whose sum is σ = 81946944. Its totient is φ = 27117440.

The previous prime is 51030971. The next prime is 51031007. The reversal of 51031005 is 50013015.

It is not a de Polignac number, because 51031005 - 2⁷ = 51030877 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51031007) 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, 1839 + ... + 10268.

It is an arithmetic number, because the mean of its divisors is an integer number (5121684).

Almost surely, 2^51031005 is an apocalyptic number.

It is an amenable number.

51031005 is a deficient number, since it is larger than the sum of its proper divisors (30915939).

51031005 is a wasteful number, since it uses less digits than its factorization.

51031005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12396.

The product of its (nonzero) digits is 75, while the sum is 15.

The square root of 51031005 is about 7143.5988829161. The cubic root of 51031005 is about 370.9181119413.

The spelling of 51031005 in words is "fifty-one million, thirty-one thousand, five".