15552131 has 4 divisors (see below), whose sum is σ = 17773872. Its totient is φ = 13330392.

The previous prime is 15552113. The next prime is 15552143. The reversal of 15552131 is 13125551.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 15552131 - 2⁶ = 15552067 is a prime.

It is a super-2 number, since 2×15552131² = 483737557282322, 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 = 15552097 and 15552106.

It is not an unprimeable number, because it can be changed into a prime (15552101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1110860 + ... + 1110873.

It is an arithmetic number, because the mean of its divisors is an integer number (4443468).

Almost surely, 2^15552131 is an apocalyptic number.

15552131 is a deficient number, since it is larger than the sum of its proper divisors (2221741).

15552131 is an equidigital number, since it uses as much as digits as its factorization.

15552131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2221740.

The product of its digits is 750, while the sum is 23.

The square root of 15552131 is about 3943.6190231816. The cubic root of 15552131 is about 249.6107596155.

Adding to 15552131 its reverse (13125551), we get a palindrome (28677682).

The spelling of 15552131 in words is "fifteen million, five hundred fifty-two thousand, one hundred thirty-one".