53712281 has 12 divisors (see below), whose sum is σ = 63365760. Its totient is φ = 45387720.

The previous prime is 53712277. The next prime is 53712287. The reversal of 53712281 is 18221735.

It is not a de Polignac number, because 53712281 - 2² = 53712277 is a prime.

It is a super-2 number, since 2×53712281² = 5770018260445922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53712287) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4241 + ... + 11198.

It is an arithmetic number, because the mean of its divisors is an integer number (5280480).

Almost surely, 2^53712281 is an apocalyptic number.

It is an amenable number.

53712281 is a deficient number, since it is larger than the sum of its proper divisors (9653479).

53712281 is a wasteful number, since it uses less digits than its factorization.

53712281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15524 (or 15517 counting only the distinct ones).

The product of its digits is 3360, while the sum is 29.

The square root of 53712281 is about 7328.8662834029. The cubic root of 53712281 is about 377.3038168972.

The spelling of 53712281 in words is "fifty-three million, seven hundred twelve thousand, two hundred eighty-one".