2190561942 has 16 divisors (see below), whose sum is σ = 4410529200. Its totient is φ = 725286432.

The previous prime is 2190561941. The next prime is 2190561953. The reversal of 2190561942 is 2491650912.

It is a super-2 number, since 2×2190561942² = 9597123243477622728, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2190561942.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2190561941) 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, 1224253 + ... + 1226040.

It is an arithmetic number, because the mean of its divisors is an integer number (275658075).

Almost surely, 2^2190561942 is an apocalyptic number.

2190561942 is an abundant number, since it is smaller than the sum of its proper divisors (2219967258).

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

2190561942 is a wasteful number, since it uses less digits than its factorization.

2190561942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2450447.

The product of its (nonzero) digits is 38880, while the sum is 39.

The square root of 2190561942 is about 46803.4394248970. The cubic root of 2190561942 is about 1298.7289236838.

The spelling of 2190561942 in words is "two billion, one hundred ninety million, five hundred sixty-one thousand, nine hundred forty-two".