15621204130 has 16 divisors (see below), whose sum is σ = 32135048640. Its totient is φ = 5355841392.

The previous prime is 15621204121. The next prime is 15621204143. The reversal of 15621204130 is 3140212651.

It is a happy number.

It is a super-2 number, since 2×15621204130² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 15621204095 and 15621204104.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 111579960 + ... + 111580099.

It is an arithmetic number, because the mean of its divisors is an integer number (2008440540).

Almost surely, 2^15621204130 is an apocalyptic number.

15621204130 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

15621204130 is an abundant number, since it is smaller than the sum of its proper divisors (16513844510).

15621204130 is a wasteful number, since it uses less digits than its factorization.

15621204130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 223160073.

The product of its (nonzero) digits is 1440, while the sum is 25.

Adding to 15621204130 its reverse (3140212651), we get a palindrome (18761416781).

The spelling of 15621204130 in words is "fifteen billion, six hundred twenty-one million, two hundred four thousand, one hundred thirty".