2151084731 has 4 divisors (see below), whose sum is σ = 2153310192. Its totient is φ = 2148859272.

The previous prime is 2151084641. The next prime is 2151084751. The reversal of 2151084731 is 1374801512.

2151084731 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2151084731 - 2¹⁴ = 2151068347 is a prime.

It is a super-2 number, since 2×2151084731² = 9254331039882684722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2151084751) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1111280 + ... + 1113213.

It is an arithmetic number, because the mean of its divisors is an integer number (538327548).

Almost surely, 2^2151084731 is an apocalyptic number.

2151084731 is a deficient number, since it is larger than the sum of its proper divisors (2225461).

2151084731 is an equidigital number, since it uses as much as digits as its factorization.

2151084731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2225460.

The product of its (nonzero) digits is 6720, while the sum is 32.

The square root of 2151084731 is about 46379.7879576869. The cubic root of 2151084731 is about 1290.8799018607.

The spelling of 2151084731 in words is "two billion, one hundred fifty-one million, eighty-four thousand, seven hundred thirty-one".