51831495 has 20 divisors (see below), whose sum is σ = 92913480. Its totient is φ = 27643248.

The previous prime is 51831457. The next prime is 51831499. The reversal of 51831495 is 59413815.

It is not a de Polignac number, because 51831495 - 2⁶ = 51831431 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51831499) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 63585 + ... + 64394.

It is an arithmetic number, because the mean of its divisors is an integer number (4645674).

Almost surely, 2^51831495 is an apocalyptic number.

51831495 is a deficient number, since it is larger than the sum of its proper divisors (41081985).

51831495 is a wasteful number, since it uses less digits than its factorization.

51831495 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127996 (or 127987 counting only the distinct ones).

The product of its digits is 21600, while the sum is 36.

The square root of 51831495 is about 7199.4093507732. The cubic root of 51831495 is about 372.8475083859.

It can be divided in two parts, 51831 and 495, that added together give a triangular number (52326 = T₃₂₃).

The spelling of 51831495 in words is "fifty-one million, eight hundred thirty-one thousand, four hundred ninety-five".