2157755 has 8 divisors (see below), whose sum is σ = 2673024. Its totient is φ = 1670400.

The previous prime is 2157739. The next prime is 2157763. The reversal of 2157755 is 5577512.

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

It is not a de Polignac number, because 2157755 - 2⁴ = 2157739 is a prime.

It is a Duffinian number.

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, 6806 + ... + 7115.

It is an arithmetic number, because the mean of its divisors is an integer number (334128).

2^2157755 is an apocalyptic number.

2157755 is a deficient number, since it is larger than the sum of its proper divisors (515269).

2157755 is a wasteful number, since it uses less digits than its factorization.

2157755 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13957.

The product of its digits is 12250, while the sum is 32.

The square root of 2157755 is about 1468.9298826016. The cubic root of 2157755 is about 129.2212815637.

The spelling of 2157755 in words is "two million, one hundred fifty-seven thousand, seven hundred fifty-five".