2257978731 has 8 divisors (see below), whose sum is σ = 3024907584. Its totient is φ = 1498184520.

The previous prime is 2257978721. The next prime is 2257978741. The reversal of 2257978731 is 1378797522.

It is an interprime number because it is at equal distance from previous prime (2257978721) and next prime (2257978741).

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

It is not a de Polignac number, because 2257978731 - 2⁵ = 2257978699 is a prime.

It is a super-2 number, since 2×2257978731² = 10196935899296740722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2257978721) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1782921 + ... + 1784186.

It is an arithmetic number, because the mean of its divisors is an integer number (378113448).

Almost surely, 2^2257978731 is an apocalyptic number.

2257978731 is a deficient number, since it is larger than the sum of its proper divisors (766928853).

2257978731 is a wasteful number, since it uses less digits than its factorization.

2257978731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3567321.

The product of its digits is 1481760, while the sum is 51.

The square root of 2257978731 is about 47518.1936841038. The cubic root of 2257978731 is about 1311.9177728542.

The spelling of 2257978731 in words is "two billion, two hundred fifty-seven million, nine hundred seventy-eight thousand, seven hundred thirty-one".