2157633394 has 16 divisors (see below), whose sum is σ = 3701192256. Its totient is φ = 924102000.

The previous prime is 2157633349. The next prime is 2157633419. The reversal of 2157633394 is 4933367512.

It is a happy number.

2157633394 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 2157633394.

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, 27057 + ... + 71044.

It is an arithmetic number, because the mean of its divisors is an integer number (231324516).

Almost surely, 2^2157633394 is an apocalyptic number.

2157633394 is a deficient number, since it is larger than the sum of its proper divisors (1543558862).

2157633394 is a wasteful number, since it uses less digits than its factorization.

2157633394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99681.

The product of its digits is 408240, while the sum is 43.

The square root of 2157633394 is about 46450.3325499398. The cubic root of 2157633394 is about 1292.1885398220.

The spelling of 2157633394 in words is "two billion, one hundred fifty-seven million, six hundred thirty-three thousand, three hundred ninety-four".