15251222540 has 12 divisors (see below), whose sum is σ = 32027567376. Its totient is φ = 6100489008.

The previous prime is 15251222473. The next prime is 15251222543. The reversal of 15251222540 is 4522215251.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (15251222543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 381280544 + ... + 381280583.

It is an arithmetic number, because the mean of its divisors is an integer number (2668963948).

Almost surely, 2^15251222540 is an apocalyptic number.

15251222540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15251222540 is an abundant number, since it is smaller than the sum of its proper divisors (16776344836).

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

15251222540 is a wasteful number, since it uses less digits than its factorization.

15251222540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 762561136 (or 762561134 counting only the distinct ones).

The product of its (nonzero) digits is 8000, while the sum is 29.

Adding to 15251222540 its reverse (4522215251), we get a palindrome (19773437791).

The spelling of 15251222540 in words is "fifteen billion, two hundred fifty-one million, two hundred twenty-two thousand, five hundred forty".