53251731 has 36 divisors (see below), whose sum is σ = 84197568. Its totient is φ = 32415552.

The previous prime is 53251711. The next prime is 53251733. The reversal of 53251731 is 13715235.

53251731 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 53251731 - 2⁷ = 53251603 is a prime.

It is a super-2 number, since 2×53251731² = 5671493708992722, which contains 22 as substring.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 53251695 and 53251704.

It is not an unprimeable number, because it can be changed into a prime (53251733) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 238686 + ... + 238908.

Almost surely, 2^53251731 is an apocalyptic number.

53251731 is a deficient number, since it is larger than the sum of its proper divisors (30945837).

53251731 is a wasteful number, since it uses less digits than its factorization.

53251731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 412 (or 396 counting only the distinct ones).

The product of its digits is 3150, while the sum is 27.

The square root of 53251731 is about 7297.3783648650. The cubic root of 53251731 is about 376.2223367188. Note that the first 3 decimals are identical.

Adding to 53251731 its reverse (13715235), we get a palindrome (66966966).

It can be divided in two parts, 5325 and 1731, that added together give a square (7056 = 84²).

The spelling of 53251731 in words is "fifty-three million, two hundred fifty-one thousand, seven hundred thirty-one".