2051142540 has 48 divisors (see below), whose sum is σ = 5758028640. Its totient is φ = 545559040.

The previous prime is 2051142487. The next prime is 2051142581. The reversal of 2051142540 is 452411502.

It is a self number, because there is not a number n which added to its sum of digits gives 2051142540.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20601 + ... + 67280.

It is an arithmetic number, because the mean of its divisors is an integer number (119958930).

Almost surely, 2^2051142540 is an apocalyptic number.

2051142540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2051142540 is an abundant number, since it is smaller than the sum of its proper divisors (3706886100).

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

2051142540 is a wasteful number, since it uses less digits than its factorization.

2051142540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88282 (or 88280 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 24.

The square root of 2051142540 is about 45289.5411767441. The cubic root of 2051142540 is about 1270.5700501639.

The spelling of 2051142540 in words is "two billion, fifty-one million, one hundred forty-two thousand, five hundred forty".