1515505530 has 64 divisors (see below), whose sum is σ = 4534714368. Its totient is φ = 314909760.

The previous prime is 1515505517. The next prime is 1515505543. The reversal of 1515505530 is 355055151.

It is an interprime number because it is at equal distance from previous prime (1515505517) and next prime (1515505543).

It is a super-2 number, since 2×1515505530² = 4593514022921161800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

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 31 ways as a sum of consecutive naturals, for example, 325722 + ... + 330341.

It is an arithmetic number, because the mean of its divisors is an integer number (70854912).

Almost surely, 2^1515505530 is an apocalyptic number.

1515505530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1515505530 is an abundant number, since it is smaller than the sum of its proper divisors (3019208838).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1515505530 is a wasteful number, since it uses less digits than its factorization.

1515505530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 656091.

The product of its (nonzero) digits is 9375, while the sum is 30.

The square root of 1515505530 is about 38929.4943455473. The cubic root of 1515505530 is about 1148.6450406001.

It can be divided in two parts, 151550 and 5530, that added together give a triangular number (157080 = T₅₆₀).

The spelling of 1515505530 in words is "one billion, five hundred fifteen million, five hundred five thousand, five hundred thirty".