15151252500 has 150 divisors (see below), whose sum is σ = 49495276754. Its totient is φ = 4040280000.

The previous prime is 15151252483. The next prime is 15151252549. The reversal of 15151252500 is 525215151.

15151252500 is a `hidden beast` number, since 1 + 5 + 151 + 2 + 5 + 2 + 500 = 666.

It can be written as a sum of positive squares in 5 ways, for example, as 6312620304 + 8838632196 = 79452^2 + 94014^2 .

It is a tau number, because it is divible by the number of its divisors (150).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 49 ways as a sum of consecutive naturals, for example, 165090 + ... + 239910.

Almost surely, 2^15151252500 is an apocalyptic number.

15151252500 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 15151252500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24747638377).

15151252500 is an abundant number, since it is smaller than the sum of its proper divisors (34344024254).

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

15151252500 is an equidigital number, since it uses as much as digits as its factorization.

15151252500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74857 (or 74831 counting only the distinct ones).

The product of its (nonzero) digits is 2500, while the sum is 27.

Adding to 15151252500 its reverse (525215151), we get a palindrome (15676467651).

The spelling of 15151252500 in words is "fifteen billion, one hundred fifty-one million, two hundred fifty-two thousand, five hundred".