15225154440 has 128 divisors (see below), whose sum is σ = 48790978560. Its totient is φ = 3787341824.

The previous prime is 15225154421. The next prime is 15225154447. The reversal of 15225154440 is 4445152251.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (15225154447) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 197497 + ... + 263543.

It is an arithmetic number, because the mean of its divisors is an integer number (381179520).

Almost surely, 2^15225154440 is an apocalyptic number.

15225154440 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 15225154440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24395489280).

15225154440 is an abundant number, since it is smaller than the sum of its proper divisors (33565824120).

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

15225154440 is a wasteful number, since it uses less digits than its factorization.

15225154440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66191 (or 66187 counting only the distinct ones).

The product of its (nonzero) digits is 32000, while the sum is 33.

The spelling of 15225154440 in words is "fifteen billion, two hundred twenty-five million, one hundred fifty-four thousand, four hundred forty".