42251515515 has 32 divisors (see below), whose sum is σ = 81942336000. Its totient is φ = 20485582560.

The previous prime is 42251515513. The next prime is 42251515517. The reversal of 42251515515 is 51551515224.

42251515515 is a `hidden beast` number, since 4 + 2 + 2 + 51 + 51 + 551 + 5 = 666.

It is an interprime number because it is at equal distance from previous prime (42251515513) and next prime (42251515517).

It is not a de Polignac number, because 42251515515 - 2¹ = 42251515513 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42251515515.

It is not an unprimeable number, because it can be changed into a prime (42251515513) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14224615 + ... + 14227584.

It is an arithmetic number, because the mean of its divisors is an integer number (2560698000).

Almost surely, 2^42251515515 is an apocalyptic number.

42251515515 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

42251515515 is a deficient number, since it is larger than the sum of its proper divisors (39690820485).

42251515515 is a wasteful number, since it uses less digits than its factorization.

42251515515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28452224 (or 28452218 counting only the distinct ones).

The product of its digits is 50000, while the sum is 36.

The spelling of 42251515515 in words is "forty-two billion, two hundred fifty-one million, five hundred fifteen thousand, five hundred fifteen".