15210420131 has 4 divisors (see below), whose sum is σ = 15289230792. Its totient is φ = 15131609472.

The previous prime is 15210420101. The next prime is 15210420157. The reversal of 15210420131 is 13102401251.

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-15210420131 is a prime.

It is a super-2 number, since 2×15210420131² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15210420101) 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, 39405041 + ... + 39405426.

It is an arithmetic number, because the mean of its divisors is an integer number (3822307698).

Almost surely, 2^15210420131 is an apocalyptic number.

15210420131 is a deficient number, since it is larger than the sum of its proper divisors (78810661).

15210420131 is an equidigital number, since it uses as much as digits as its factorization.

15210420131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78810660.

The product of its (nonzero) digits is 240, while the sum is 20.

Adding to 15210420131 its reverse (13102401251), we get a palindrome (28312821382).

The spelling of 15210420131 in words is "fifteen billion, two hundred ten million, four hundred twenty thousand, one hundred thirty-one".