2051236564 has 24 divisors (see below), whose sum is σ = 3867083528. Its totient is φ = 946408320.

The previous prime is 2051236513. The next prime is 2051236567. The reversal of 2051236564 is 4656321502.

It can be written as a sum of positive squares in 4 ways, for example, as 379080900 + 1672155664 = 19470^2 + 40892^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2051236567) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 234754 + ... + 243334.

Almost surely, 2^2051236564 is an apocalyptic number.

It is an amenable number.

2051236564 is a deficient number, since it is larger than the sum of its proper divisors (1815846964).

2051236564 is a wasteful number, since it uses less digits than its factorization.

2051236564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13195 (or 13193 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 34.

The square root of 2051236564 is about 45290.5791970030. The cubic root of 2051236564 is about 1270.5894641004.

The spelling of 2051236564 in words is "two billion, fifty-one million, two hundred thirty-six thousand, five hundred sixty-four".