2151322515 has 24 divisors (see below), whose sum is σ = 3857546160. Its totient is φ = 1107806784.

The previous prime is 2151322489. The next prime is 2151322541. The reversal of 2151322515 is 5152231512.

2151322515 is a `hidden beast` number, since 2 + 15 + 132 + 2 + 515 = 666.

It is an interprime number because it is at equal distance from previous prime (2151322489) and next prime (2151322541).

It is not a de Polignac number, because 2151322515 - 2⁷ = 2151322387 is a prime.

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 23 ways as a sum of consecutive naturals, for example, 822957 + ... + 825566.

It is an arithmetic number, because the mean of its divisors is an integer number (160731090).

Almost surely, 2^2151322515 is an apocalyptic number.

2151322515 is a deficient number, since it is larger than the sum of its proper divisors (1706223645).

2151322515 is a wasteful number, since it uses less digits than its factorization.

2151322515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1648563 (or 1648560 counting only the distinct ones).

The product of its digits is 3000, while the sum is 27.

The square root of 2151322515 is about 46382.3513310828. The cubic root of 2151322515 is about 1290.9274653485.

The spelling of 2151322515 in words is "two billion, one hundred fifty-one million, three hundred twenty-two thousand, five hundred fifteen".