15122135550 has 96 divisors (see below), whose sum is σ = 39173921280. Its totient is φ = 3855600000.

The previous prime is 15122135537. The next prime is 15122135573. The reversal of 15122135550 is 5553122151.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 431175 + ... + 464925.

It is an arithmetic number, because the mean of its divisors is an integer number (408061680).

Almost surely, 2^15122135550 is an apocalyptic number.

15122135550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 15122135550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19586960640).

15122135550 is an abundant number, since it is smaller than the sum of its proper divisors (24051785730).

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

15122135550 is a wasteful number, since it uses less digits than its factorization.

15122135550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33898 (or 33893 counting only the distinct ones).

The product of its (nonzero) digits is 7500, while the sum is 30.

The spelling of 15122135550 in words is "fifteen billion, one hundred twenty-two million, one hundred thirty-five thousand, five hundred fifty".