53415531 has 48 divisors (see below), whose sum is σ = 88690784. Its totient is φ = 31912704.

The previous prime is 53415529. The next prime is 53415533. The reversal of 53415531 is 13551435.

It is an interprime number because it is at equal distance from previous prime (53415529) and next prime (53415533).

It is not a de Polignac number, because 53415531 - 2¹ = 53415529 is a prime.

It is a super-2 number, since 2×53415531² = 5706437904023922, 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 = 53415495 and 53415504.

It is not an unprimeable number, because it can be changed into a prime (53415533) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 116655 + ... + 117111.

Almost surely, 2^53415531 is an apocalyptic number.

53415531 is a deficient number, since it is larger than the sum of its proper divisors (35275253).

53415531 is a wasteful number, since it uses less digits than its factorization.

53415531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 522 (or 510 counting only the distinct ones).

The product of its digits is 4500, while the sum is 27.

The square root of 53415531 is about 7308.5929562399. The cubic root of 53415531 is about 376.6076897071.

Adding to 53415531 its reverse (13551435), we get a palindrome (66966966).

The spelling of 53415531 in words is "fifty-three million, four hundred fifteen thousand, five hundred thirty-one".