15211020425 has 24 divisors (see below), whose sum is σ = 18979222752. Its totient is φ = 12093200000.

The previous prime is 15211020397. The next prime is 15211020427. The reversal of 15211020425 is 52402011251.

It is not a de Polignac number, because 15211020425 - 2²⁰ = 15209971849 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 15211020425.

It is not an unprimeable number, because it can be changed into a prime (15211020427) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3078557 + ... + 3083493.

It is an arithmetic number, because the mean of its divisors is an integer number (790800948).

Almost surely, 2^15211020425 is an apocalyptic number.

It is an amenable number.

15211020425 is a deficient number, since it is larger than the sum of its proper divisors (3768202327).

15211020425 is a wasteful number, since it uses less digits than its factorization.

15211020425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5689 (or 5684 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 23.

Adding to 15211020425 its reverse (52402011251), we get a palindrome (67613031676).

The spelling of 15211020425 in words is "fifteen billion, two hundred eleven million, twenty thousand, four hundred twenty-five".