15120425531 has 4 divisors (see below), whose sum is σ = 15346103592. Its totient is φ = 14894747472.

The previous prime is 15120425519. The next prime is 15120425533. The reversal of 15120425531 is 13552402151.

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 15120425531 - 2¹⁰ = 15120424507 is a prime.

It is a super-2 number, since 2×15120425531² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 15120425494 and 15120425503.

It is not an unprimeable number, because it can be changed into a prime (15120425533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 112838930 + ... + 112839063.

It is an arithmetic number, because the mean of its divisors is an integer number (3836525898).

Almost surely, 2^15120425531 is an apocalyptic number.

15120425531 is a deficient number, since it is larger than the sum of its proper divisors (225678061).

15120425531 is an equidigital number, since it uses as much as digits as its factorization.

15120425531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 225678060.

The product of its (nonzero) digits is 6000, while the sum is 29.

Adding to 15120425531 its reverse (13552402151), we get a palindrome (28672827682).

The spelling of 15120425531 in words is "fifteen billion, one hundred twenty million, four hundred twenty-five thousand, five hundred thirty-one".