2315221990 has 16 divisors (see below), whose sum is σ = 4208662800. Its totient is φ = 916919200.

The previous prime is 2315221969. The next prime is 2315222033. The reversal of 2315221990 is 991225132.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1145140 + ... + 1147159.

It is an arithmetic number, because the mean of its divisors is an integer number (263041425).

Almost surely, 2^2315221990 is an apocalyptic number.

2315221990 is a deficient number, since it is larger than the sum of its proper divisors (1893440810).

2315221990 is a wasteful number, since it uses less digits than its factorization.

2315221990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2292407.

The product of its (nonzero) digits is 9720, while the sum is 34.

The square root of 2315221990 is about 48116.7537350557. The cubic root of 2315221990 is about 1322.9117674643.

The spelling of 2315221990 in words is "two billion, three hundred fifteen million, two hundred twenty-one thousand, nine hundred ninety".