2151931015 has 8 divisors (see below), whose sum is σ = 2780957088. Its totient is φ = 1589118240.

The previous prime is 2151930959. The next prime is 2151931021. The reversal of 2151931015 is 5101391512.

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

It is not a de Polignac number, because 2151931015 - 2⁷ = 2151930887 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16553251 + ... + 16553380.

It is an arithmetic number, because the mean of its divisors is an integer number (347619636).

Almost surely, 2^2151931015 is an apocalyptic number.

2151931015 is a deficient number, since it is larger than the sum of its proper divisors (629026073).

2151931015 is a wasteful number, since it uses less digits than its factorization.

2151931015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33106649.

The product of its (nonzero) digits is 1350, while the sum is 28.

The square root of 2151931015 is about 46388.9104743795. The cubic root of 2151931015 is about 1291.0491665047.

The spelling of 2151931015 in words is "two billion, one hundred fifty-one million, nine hundred thirty-one thousand, fifteen".