2157041775 has 96 divisors (see below), whose sum is σ = 4357721088. Its totient is φ = 919987200.

The previous prime is 2157041701. The next prime is 2157041791. The reversal of 2157041775 is 5771407512.

It is a happy number.

It is not a de Polignac number, because 2157041775 - 2¹² = 2157037679 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 492897 + ... + 497253.

It is an arithmetic number, because the mean of its divisors is an integer number (45392928).

Almost surely, 2^2157041775 is an apocalyptic number.

2157041775 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

2157041775 is an abundant number, since it is smaller than the sum of its proper divisors (2200679313).

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

2157041775 is a wasteful number, since it uses less digits than its factorization.

2157041775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4441 (or 4436 counting only the distinct ones).

The product of its (nonzero) digits is 68600, while the sum is 39.

The square root of 2157041775 is about 46443.9638166253. The cubic root of 2157041775 is about 1292.0704238069.

The spelling of 2157041775 in words is "two billion, one hundred fifty-seven million, forty-one thousand, seven hundred seventy-five".