5213115531 has 40 divisors (see below), whose sum is σ = 8751204000. Its totient is φ = 3068575488.

The previous prime is 5213115529. The next prime is 5213115533. The reversal of 5213115531 is 1355113125.

5213115531 is a `hidden beast` number, since 5 + 2 + 13 + 115 + 531 = 666.

It is an interprime number because it is at equal distance from previous prime (5213115529) and next prime (5213115533).

It is not a de Polignac number, because 5213115531 - 2¹ = 5213115529 is a prime.

It is a super-2 number, since 2×5213115531² = 54353147079106823922, 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 = 5213115495 and 5213115504.

It is not an unprimeable number, because it can be changed into a prime (5213115533) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 83406 + ... + 131843.

It is an arithmetic number, because the mean of its divisors is an integer number (218780100).

Almost surely, 2^5213115531 is an apocalyptic number.

5213115531 is a deficient number, since it is larger than the sum of its proper divisors (3538088469).

5213115531 is a wasteful number, since it uses less digits than its factorization.

5213115531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215297 (or 215288 counting only the distinct ones).

The product of its digits is 2250, while the sum is 27.

The square root of 5213115531 is about 72201.9080842051. The cubic root of 5213115531 is about 1733.9335500930.

Adding to 5213115531 its reverse (1355113125), we get a palindrome (6568228656).

The spelling of 5213115531 in words is "five billion, two hundred thirteen million, one hundred fifteen thousand, five hundred thirty-one".