53155731 has 16 divisors (see below), whose sum is σ = 74723328. Its totient is φ = 33561600.

The previous prime is 53155727. The next prime is 53155741. The reversal of 53155731 is 13755135.

It is not a de Polignac number, because 53155731 - 2² = 53155727 is a prime.

It is a super-2 number, since 2×53155731² = 5651063476288722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (53155741) 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, 1710 + ... + 10451.

It is an arithmetic number, because the mean of its divisors is an integer number (4670208).

Almost surely, 2^53155731 is an apocalyptic number.

53155731 is a deficient number, since it is larger than the sum of its proper divisors (21567597).

53155731 is a wasteful number, since it uses less digits than its factorization.

53155731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12242.

The product of its digits is 7875, while the sum is 30.

The square root of 53155731 is about 7290.7976929826. The cubic root of 53155731 is about 375.9961214139.

The spelling of 53155731 in words is "fifty-three million, one hundred fifty-five thousand, seven hundred thirty-one".