2157099634 has 16 divisors (see below), whose sum is σ = 3349082520. Its totient is φ = 1040780160.

The previous prime is 2157099613. The next prime is 2157099653. The reversal of 2157099634 is 4369907512.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1657711225 + 499388409 = 40715^2 + 22347^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 106264 + ... + 124924.

Almost surely, 2^2157099634 is an apocalyptic number.

2157099634 is a deficient number, since it is larger than the sum of its proper divisors (1191982886).

2157099634 is a wasteful number, since it uses less digits than its factorization.

2157099634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20685.

The product of its (nonzero) digits is 408240, while the sum is 46.

The square root of 2157099634 is about 46444.5867028656. The cubic root of 2157099634 is about 1292.0819762387.

The spelling of 2157099634 in words is "two billion, one hundred fifty-seven million, ninety-nine thousand, six hundred thirty-four".