2051001520 has 40 divisors (see below), whose sum is σ = 4781640384. Its totient is φ = 818153472.

The previous prime is 2051001497. The next prime is 2051001551. The reversal of 2051001520 is 251001502.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a junction number, because it is equal to n+sod(n) for n = 2051001494 and 2051001503.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5569 + ... + 64288.

Almost surely, 2^2051001520 is an apocalyptic number.

2051001520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2051001520 is an abundant number, since it is smaller than the sum of its proper divisors (2730638864).

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

2051001520 is a wasteful number, since it uses less digits than its factorization.

2051001520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70237 (or 70231 counting only the distinct ones).

The product of its (nonzero) digits is 100, while the sum is 16.

The square root of 2051001520 is about 45287.9842783933. The cubic root of 2051001520 is about 1270.5409314505.

The spelling of 2051001520 in words is "two billion, fifty-one million, one thousand, five hundred twenty".