15020342531 has 4 divisors (see below), whose sum is σ = 15160719672. Its totient is φ = 14879965392.

The previous prime is 15020342507. The next prime is 15020342581. The reversal of 15020342531 is 13524302051.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15020342531 is a prime.

It is a super-2 number, since 2×15020342531² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 15020342531.

It is not an unprimeable number, because it can be changed into a prime (15020342581) 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, 70188410 + ... + 70188623.

It is an arithmetic number, because the mean of its divisors is an integer number (3790179918).

Almost surely, 2^15020342531 is an apocalyptic number.

15020342531 is a deficient number, since it is larger than the sum of its proper divisors (140377141).

15020342531 is a wasteful number, since it uses less digits than its factorization.

15020342531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140377140.

The product of its (nonzero) digits is 3600, while the sum is 26.

Adding to 15020342531 its reverse (13524302051), we get a palindrome (28544644582).

The spelling of 15020342531 in words is "fifteen billion, twenty million, three hundred forty-two thousand, five hundred thirty-one".