2113391550 has 96 divisors (see below), whose sum is σ = 5574902112. Its totient is φ = 527994880.

The previous prime is 2113391521. The next prime is 2113391557. The reversal of 2113391550 is 551933112.

It is a super-2 number, since 2×2113391550² = 8932847687222805000, which contains 22 as substring.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2113391557) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 592372 + ... + 595928.

It is an arithmetic number, because the mean of its divisors is an integer number (58071897).

Almost surely, 2^2113391550 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2113391550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2787451056).

2113391550 is an abundant number, since it is smaller than the sum of its proper divisors (3461510562).

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

2113391550 is a wasteful number, since it uses less digits than its factorization.

2113391550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3822 (or 3817 counting only the distinct ones).

The product of its (nonzero) digits is 4050, while the sum is 30.

The square root of 2113391550 is about 45971.6385394299. The cubic root of 2113391550 is about 1283.2954532400.

The spelling of 2113391550 in words is "two billion, one hundred thirteen million, three hundred ninety-one thousand, five hundred fifty".