2051564 has 6 divisors (see below), whose sum is σ = 3590244. Its totient is φ = 1025780.

The previous prime is 2051537. The next prime is 2051587. The reversal of 2051564 is 4651502.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 256442 + ... + 256449.

It is an arithmetic number, because the mean of its divisors is an integer number (598374).

2^2051564 is an apocalyptic number.

It is an amenable number.

2051564 is a deficient number, since it is larger than the sum of its proper divisors (1538680).

2051564 is a wasteful number, since it uses less digits than its factorization.

2051564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 512895 (or 512893 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 2051564 is about 1432.3281746862. The cubic root of 2051564 is about 127.0657067971.

The spelling of 2051564 in words is "two million, fifty-one thousand, five hundred sixty-four".