53497731 has 16 divisors (see below), whose sum is σ = 82363904. Its totient is φ = 30253824.

The previous prime is 53497729. The next prime is 53497751. The reversal of 53497731 is 13779435.

It is a happy number.

It is not a de Polignac number, because 53497731 - 2¹ = 53497729 is a prime.

It is a super-2 number, since 2×53497731² = 5724014444296722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 53497731.

It is not an unprimeable number, because it can be changed into a prime (53497751) 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, 11095 + ... + 15168.

It is an arithmetic number, because the mean of its divisors is an integer number (5147744).

Almost surely, 2^53497731 is an apocalyptic number.

53497731 is a deficient number, since it is larger than the sum of its proper divisors (28866173).

53497731 is a wasteful number, since it uses less digits than its factorization.

53497731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26370.

The product of its digits is 79380, while the sum is 39.

The square root of 53497731 is about 7314.2143118725. The cubic root of 53497731 is about 376.8007751594.

The spelling of 53497731 in words is "fifty-three million, four hundred ninety-seven thousand, seven hundred thirty-one".