15525145131 has 4 divisors (see below), whose sum is σ = 20700193512. Its totient is φ = 10350096752.

The previous prime is 15525145121. The next prime is 15525145159. The reversal of 15525145131 is 13154152551.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13154152551 = 3 ⋅4384717517.

It is a cyclic number.

It is not a de Polignac number, because 15525145131 - 2⁷ = 15525145003 is a prime.

It is a super-2 number, since 2×15525145131² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 15525145092 and 15525145101.

It is not an unprimeable number, because it can be changed into a prime (15525145121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2587524186 + ... + 2587524191.

It is an arithmetic number, because the mean of its divisors is an integer number (5175048378).

Almost surely, 2^15525145131 is an apocalyptic number.

15525145131 is a deficient number, since it is larger than the sum of its proper divisors (5175048381).

15525145131 is an equidigital number, since it uses as much as digits as its factorization.

15525145131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5175048380.

The product of its digits is 15000, while the sum is 33.

Adding to 15525145131 its reverse (13154152551), we get a palindrome (28679297682).

The spelling of 15525145131 in words is "fifteen billion, five hundred twenty-five million, one hundred forty-five thousand, one hundred thirty-one".