2151001540 has 24 divisors (see below), whose sum is σ = 4552676352. Its totient is φ = 853624800.

The previous prime is 2151001507. The next prime is 2151001553. The reversal of 2151001540 is 451001512.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 420886 + ... + 425965.

It is an arithmetic number, because the mean of its divisors is an integer number (189694848).

Almost surely, 2^2151001540 is an apocalyptic number.

2151001540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2151001540 is an abundant number, since it is smaller than the sum of its proper divisors (2401674812).

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

2151001540 is a wasteful number, since it uses less digits than its factorization.

2151001540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 846987 (or 846985 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 19.

The square root of 2151001540 is about 46378.8911036045. The cubic root of 2151001540 is about 1290.8632604932.

The spelling of 2151001540 in words is "two billion, one hundred fifty-one million, one thousand, five hundred forty".