15216315100 has 72 divisors (see below), whose sum is σ = 37799087648. Its totient is φ = 5208364800.

The previous prime is 15216315097. The next prime is 15216315151. The reversal of 15216315100 is 151361251.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 411370 + ... + 446830.

Almost surely, 2^15216315100 is an apocalyptic number.

15216315100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 15216315100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18899543824).

15216315100 is an abundant number, since it is smaller than the sum of its proper divisors (22582772548).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

15216315100 is a wasteful number, since it uses less digits than its factorization.

15216315100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36095 (or 36088 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 25.

Adding to 15216315100 its reverse (151361251), we get a palindrome (15367676351).

The spelling of 15216315100 in words is "fifteen billion, two hundred sixteen million, three hundred fifteen thousand, one hundred".