2251157 has 4 divisors (see below), whose sum is σ = 2383596. Its totient is φ = 2118720.

The previous prime is 2251153. The next prime is 2251163. The reversal of 2251157 is 7511522.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 844561 + 1406596 = 919^2 + 1186^2 .

It is a cyclic number.

It is not a de Polignac number, because 2251157 - 2² = 2251153 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2251153) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66194 + ... + 66227.

It is an arithmetic number, because the mean of its divisors is an integer number (595899).

2^2251157 is an apocalyptic number.

It is an amenable number.

2251157 is a deficient number, since it is larger than the sum of its proper divisors (132439).

2251157 is a wasteful number, since it uses less digits than its factorization.

2251157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132438.

The product of its digits is 700, while the sum is 23.

The square root of 2251157 is about 1500.3856170998. The cubic root of 2251157 is about 131.0595265860.

Adding to 2251157 its reverse (7511522), we get a palindrome (9762679).

The spelling of 2251157 in words is "two million, two hundred fifty-one thousand, one hundred fifty-seven".