2257400349 has 6 divisors (see below), whose sum is σ = 3260689406. Its totient is φ = 1504933560.

The previous prime is 2257400333. The next prime is 2257400371. The reversal of 2257400349 is 9430047522.

It can be written as a sum of positive squares in only one way, i.e., 2237952249 + 19448100 = 47307^2 + 4410^2 .

It is not a de Polignac number, because 2257400349 - 2⁴ = 2257400333 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2257400329) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 125411122 + ... + 125411139.

Almost surely, 2^2257400349 is an apocalyptic number.

It is an amenable number.

2257400349 is a deficient number, since it is larger than the sum of its proper divisors (1003289057).

2257400349 is a wasteful number, since it uses less digits than its factorization.

2257400349 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 250822267 (or 250822264 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 36.

The square root of 2257400349 is about 47512.1073938002. The cubic root of 2257400349 is about 1311.8057472312.

The spelling of 2257400349 in words is "two billion, two hundred fifty-seven million, four hundred thousand, three hundred forty-nine".