2312221690 has 16 divisors (see below), whose sum is σ = 4194772992. Its totient is φ = 917605584.

The previous prime is 2312221633. The next prime is 2312221693. The reversal of 2312221690 is 961222132.

It is a super-2 number, since 2×2312221690² = 10692738287412912200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2312221693) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 909054 + ... + 911593.

It is an arithmetic number, because the mean of its divisors is an integer number (262173312).

Almost surely, 2^2312221690 is an apocalyptic number.

2312221690 is a deficient number, since it is larger than the sum of its proper divisors (1882551302).

2312221690 is a wasteful number, since it uses less digits than its factorization.

2312221690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1820781.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 2312221690 is about 48085.5663375196. The cubic root of 2312221690 is about 1322.3400659222.

The spelling of 2312221690 in words is "two billion, three hundred twelve million, two hundred twenty-one thousand, six hundred ninety".