7513131 has 4 divisors (see below), whose sum is σ = 10017512. Its totient is φ = 5008752.

The previous prime is 7513123. The next prime is 7513139. The reversal of 7513131 is 1313157.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1313157 = 3 ⋅437719.

It is an interprime number because it is at equal distance from previous prime (7513123) and next prime (7513139).

It is not a de Polignac number, because 7513131 - 2³ = 7513123 is a prime.

It is a super-2 number, since 2×7513131² = 112894274846322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 7513098 and 7513107.

It is not an unprimeable number, because it can be changed into a prime (7513139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1252186 + ... + 1252191.

It is an arithmetic number, because the mean of its divisors is an integer number (2504378).

Almost surely, 2^7513131 is an apocalyptic number.

7513131 is a deficient number, since it is larger than the sum of its proper divisors (2504381).

7513131 is a wasteful number, since it uses less digits than its factorization.

7513131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2504380.

The product of its digits is 315, while the sum is 21.

The square root of 7513131 is about 2741.0091207437. The cubic root of 7513131 is about 195.8575512929.

Adding to 7513131 its reverse (1313157), we get a palindrome (8826288).

The spelling of 7513131 in words is "seven million, five hundred thirteen thousand, one hundred thirty-one".