2153205738 has 24 divisors (see below), whose sum is σ = 4668590628. Its totient is φ = 717225792.

The previous prime is 2153205727. The next prime is 2153205757. The reversal of 2153205738 is 8375023512.

It is a happy number.

2153205738 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 1778899329 + 374306409 = 42177^2 + 19347^2 .

It is a super-2 number, since 2×2153205738² = 9272589900312249288, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15945 + ... + 67532.

Almost surely, 2^2153205738 is an apocalyptic number.

2153205738 is an abundant number, since it is smaller than the sum of its proper divisors (2515384890).

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

2153205738 is a wasteful number, since it uses less digits than its factorization.

2153205738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84918 (or 84915 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 36.

The square root of 2153205738 is about 46402.6479632359. The cubic root of 2153205738 is about 1291.3040391758.

The spelling of 2153205738 in words is "two billion, one hundred fifty-three million, two hundred five thousand, seven hundred thirty-eight".