2742123731 has 16 divisors (see below), whose sum is σ = 2821521600. Its totient is φ = 2664076800.

The previous prime is 2742123721. The next prime is 2742123781. The reversal of 2742123731 is 1373212472.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2742123731 is a prime.

It is a super-2 number, since 2×2742123731² = 15038485112226720722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2742123701) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2583941 + ... + 2585001.

It is an arithmetic number, because the mean of its divisors is an integer number (176345100).

Almost surely, 2^2742123731 is an apocalyptic number.

2742123731 is a deficient number, since it is larger than the sum of its proper divisors (79397869).

2742123731 is a wasteful number, since it uses less digits than its factorization.

2742123731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1630.

The product of its digits is 14112, while the sum is 32.

The square root of 2742123731 is about 52365.2912815349. The cubic root of 2742123731 is about 1399.6808338760.

The spelling of 2742123731 in words is "two billion, seven hundred forty-two million, one hundred twenty-three thousand, seven hundred thirty-one".