2151087731 has 8 divisors (see below), whose sum is σ = 2396437680. Its totient is φ = 1917149472.

The previous prime is 2151087721. The next prime is 2151087739. The reversal of 2151087731 is 1377801512.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 2151087731 - 2¹⁴ = 2151071347 is a prime.

It is a super-2 number, since 2×2151087731² = 9254356852917456722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2151087691 and 2151087700.

It is not an unprimeable number, because it can be changed into a prime (2151087739) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2852525 + ... + 2853278.

It is an arithmetic number, because the mean of its divisors is an integer number (299554710).

Almost surely, 2^2151087731 is an apocalyptic number.

2151087731 is a deficient number, since it is larger than the sum of its proper divisors (245349949).

2151087731 is a wasteful number, since it uses less digits than its factorization.

2151087731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5705845.

The product of its (nonzero) digits is 11760, while the sum is 35.

The square root of 2151087731 is about 46379.8202993500. The cubic root of 2151087731 is about 1290.8805019669.

The spelling of 2151087731 in words is "two billion, one hundred fifty-one million, eighty-seven thousand, seven hundred thirty-one".