2151020515 has 16 divisors (see below), whose sum is σ = 3021923520. Its totient is φ = 1439009280.

The previous prime is 2151020507. The next prime is 2151020539. The reversal of 2151020515 is 5150201512.

It is a happy number.

It is not a de Polignac number, because 2151020515 - 2³ = 2151020507 is a prime.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 748050 + ... + 750919.

It is an arithmetic number, because the mean of its divisors is an integer number (188870220).

Almost surely, 2^2151020515 is an apocalyptic number.

2151020515 is a deficient number, since it is larger than the sum of its proper divisors (870903005).

2151020515 is a wasteful number, since it uses less digits than its factorization.

2151020515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1499022.

The product of its (nonzero) digits is 500, while the sum is 22.

The square root of 2151020515 is about 46379.0956681995. The cubic root of 2151020515 is about 1290.8670562535.

It can be divided in two parts, 21510 and 20515, that added together give a square (42025 = 205²).

The spelling of 2151020515 in words is "two billion, one hundred fifty-one million, twenty thousand, five hundred fifteen".