2145565051 has 16 divisors (see below), whose sum is σ = 2578857984. Its totient is φ = 1745229024.

The previous prime is 2145565043. The next prime is 2145565069. The reversal of 2145565051 is 1505655412.

It is not a de Polignac number, because 2145565051 - 2³ = 2145565043 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2145564998 and 2145565016.

It is not an unprimeable number, because it can be changed into a prime (2145565091) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32020 + ... + 72913.

It is an arithmetic number, because the mean of its divisors is an integer number (161178624).

Almost surely, 2^2145565051 is an apocalyptic number.

2145565051 is a deficient number, since it is larger than the sum of its proper divisors (433292933).

2145565051 is a wasteful number, since it uses less digits than its factorization.

2145565051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105090.

The product of its (nonzero) digits is 30000, while the sum is 34.

The square root of 2145565051 is about 46320.2445049678. The cubic root of 2145565051 is about 1289.7748241865.

The spelling of 2145565051 in words is "two billion, one hundred forty-five million, five hundred sixty-five thousand, fifty-one".