2015145287 has 4 divisors (see below), whose sum is σ = 2015236920. Its totient is φ = 2015053656.

The previous prime is 2015145281. The next prime is 2015145289. The reversal of 2015145287 is 7825415102.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 2015145287 - 2⁴ = 2015145271 is a prime.

It is a deceptive number, since it divides R_2015145286.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2015145281) 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, 9164 + ... + 64142.

It is an arithmetic number, because the mean of its divisors is an integer number (503809230).

Almost surely, 2^2015145287 is an apocalyptic number.

2015145287 is the 36653-rd pentagonal number.

2015145287 is a deficient number, since it is larger than the sum of its proper divisors (91633).

2015145287 is an equidigital number, since it uses as much as digits as its factorization.

2015145287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91632.

The product of its (nonzero) digits is 22400, while the sum is 35.

The square root of 2015145287 is about 44890.3696465066. The cubic root of 2015145287 is about 1263.0933666943.

The spelling of 2015145287 in words is "two billion, fifteen million, one hundred forty-five thousand, two hundred eighty-seven".