2749865531 has 12 divisors (see below), whose sum is σ = 3221238096. Its totient is φ = 2299529280.

The previous prime is 2749865501. The next prime is 2749865537. The reversal of 2749865531 is 1355689472.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-2749865531 is a prime.

It is a super-2 number, since 2×2749865531² = 15123520877163823922, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2749865531.

It is not an unprimeable number, because it can be changed into a prime (2749865537) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 105080 + ... + 128613.

It is an arithmetic number, because the mean of its divisors is an integer number (268436508).

Almost surely, 2^2749865531 is an apocalyptic number.

2749865531 is a deficient number, since it is larger than the sum of its proper divisors (471372565).

2749865531 is an equidigital number, since it uses as much as digits as its factorization.

2749865531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 233782 (or 233741 counting only the distinct ones).

The product of its digits is 1814400, while the sum is 50.

The square root of 2749865531 is about 52439.1602812249. The cubic root of 2749865531 is about 1400.9968293539.

The spelling of 2749865531 in words is "two billion, seven hundred forty-nine million, eight hundred sixty-five thousand, five hundred thirty-one".