51031044 has 36 divisors (see below), whose sum is σ = 129221820. Its totient is φ = 16980480.

The previous prime is 51031031. The next prime is 51031073. The reversal of 51031044 is 44013015.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 32626944 + 18404100 = 5712^2 + 4290^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 30912 + ... + 32520.

It is an arithmetic number, because the mean of its divisors is an integer number (3589495).

Almost surely, 2^51031044 is an apocalyptic number.

It is an amenable number.

51031044 is an abundant number, since it is smaller than the sum of its proper divisors (78190776).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51031044 is a wasteful number, since it uses less digits than its factorization.

51031044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2500 (or 2495 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 51031044 is about 7143.6016126321. The cubic root of 51031044 is about 370.9182064316.

Adding to 51031044 its reverse (44013015), we get a palindrome (95044059).

The spelling of 51031044 in words is "fifty-one million, thirty-one thousand, forty-four".