53242731 has 16 divisors (see below), whose sum is σ = 83030400. Its totient is φ = 33626664.

The previous prime is 53242727. The next prime is 53242789. The reversal of 53242731 is 13724235.

It is not a de Polignac number, because 53242731 - 2² = 53242727 is a prime.

It is a super-2 number, since 2×53242731² = 5669576808676722, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 53242695 and 53242704.

It is not an unprimeable number, because it can be changed into a prime (53242711) 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, 51381 + ... + 52406.

It is an arithmetic number, because the mean of its divisors is an integer number (5189400).

Almost surely, 2^53242731 is an apocalyptic number.

53242731 is a deficient number, since it is larger than the sum of its proper divisors (29787669).

53242731 is a wasteful number, since it uses less digits than its factorization.

53242731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103815 (or 103809 counting only the distinct ones).

The product of its digits is 5040, while the sum is 27.

The square root of 53242731 is about 7296.7616789916. The cubic root of 53242731 is about 376.2011405891.

Adding to 53242731 its reverse (13724235), we get a palindrome (66966966).

The spelling of 53242731 in words is "fifty-three million, two hundred forty-two thousand, seven hundred thirty-one".