2251138 has 4 divisors (see below), whose sum is σ = 3376710. Its totient is φ = 1125568.

The previous prime is 2251129. The next prime is 2251147. The reversal of 2251138 is 8311522.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8311522 = 2 ⋅4155761.

It is an interprime number because it is at equal distance from previous prime (2251129) and next prime (2251147).

It can be written as a sum of positive squares in only one way, i.e., 1361889 + 889249 = 1167^2 + 943^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 562783 + ... + 562786.

2^2251138 is an apocalyptic number.

2251138 is a deficient number, since it is larger than the sum of its proper divisors (1125572).

2251138 is a wasteful number, since it uses less digits than its factorization.

2251138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1125571.

The product of its digits is 480, while the sum is 22.

The square root of 2251138 is about 1500.3792853809. The cubic root of 2251138 is about 131.0591578663.

The spelling of 2251138 in words is "two million, two hundred fifty-one thousand, one hundred thirty-eight".