1520515090 has 32 divisors (see below), whose sum is σ = 2885440320. Its totient is φ = 575302464.

The previous prime is 1520515081. The next prime is 1520515099. The reversal of 1520515090 is 905150251.

It is an interprime number because it is at equal distance from previous prime (1520515081) and next prime (1520515099).

It is a super-2 number, since 2×1520515090² = 4623932277835416200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1520515099) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 123912 + ... + 135628.

It is an arithmetic number, because the mean of its divisors is an integer number (90170010).

Almost surely, 2^1520515090 is an apocalyptic number.

1520515090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1520515090 is a deficient number, since it is larger than the sum of its proper divisors (1364925230).

1520515090 is a wasteful number, since it uses less digits than its factorization.

1520515090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12426.

The product of its (nonzero) digits is 2250, while the sum is 28.

The square root of 1520515090 is about 38993.7827095551. The cubic root of 1520515090 is about 1149.9092782875.

The spelling of 1520515090 in words is "one billion, five hundred twenty million, five hundred fifteen thousand, ninety".