15212286990 has 48 divisors (see below), whose sum is σ = 40516637616. Its totient is φ = 3957667200.

The previous prime is 15212286983. The next prime is 15212287019. The reversal of 15212286990 is 9968221251.

It is a happy number.

It is a super-2 number, since 2×15212286990² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2057596 + ... + 2064975.

It is an arithmetic number, because the mean of its divisors is an integer number (844096617).

Almost surely, 2^15212286990 is an apocalyptic number.

15212286990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

15212286990 is an abundant number, since it is smaller than the sum of its proper divisors (25304350626).

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

15212286990 is a wasteful number, since it uses less digits than its factorization.

15212286990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4122625 (or 4122622 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 45.

The spelling of 15212286990 in words is "fifteen billion, two hundred twelve million, two hundred eighty-six thousand, nine hundred ninety".