2158901090 has 8 divisors (see below), whose sum is σ = 3886021980. Its totient is φ = 863560432.

The previous prime is 2158901089. The next prime is 2158901117. The reversal of 2158901090 is 901098512.

It can be written as a sum of positive squares in 2 ways, for example, as 2054718241 + 104182849 = 45329^2 + 10207^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 2158901090.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 107945045 + ... + 107945064.

Almost surely, 2^2158901090 is an apocalyptic number.

2158901090 is a deficient number, since it is larger than the sum of its proper divisors (1727120890).

2158901090 is a wasteful number, since it uses less digits than its factorization.

2158901090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215890116.

The product of its (nonzero) digits is 6480, while the sum is 35.

The square root of 2158901090 is about 46463.9762611854. The cubic root of 2158901090 is about 1292.4415611084.

The spelling of 2158901090 in words is "two billion, one hundred fifty-eight million, nine hundred one thousand, ninety".