2543157 has 10 divisors (see below), whose sum is σ = 3799158. Its totient is φ = 1695384.

The previous prime is 2543153. The next prime is 2543159. The reversal of 2543157 is 7513452.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 2099601 + 443556 = 1449^2 + 666^2 .

It is not a de Polignac number, because 2543157 - 2² = 2543153 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 2543157.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2543153) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 15618 + ... + 15779.

2^2543157 is an apocalyptic number.

2543157 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

2543157 is a deficient number, since it is larger than the sum of its proper divisors (1256001).

2543157 is an equidigital number, since it uses as much as digits as its factorization.

2543157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31409 (or 31400 counting only the distinct ones).

The product of its digits is 4200, while the sum is 27.

The square root of 2543157 is about 1594.7278764730. The cubic root of 2543157 is about 136.4974036458.

The spelling of 2543157 in words is "two million, five hundred forty-three thousand, one hundred fifty-seven".