2145322051 has 4 divisors (see below), whose sum is σ = 2146104072. Its totient is φ = 2144540032.

The previous prime is 2145322043. The next prime is 2145322057. The reversal of 2145322051 is 1502235412.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2145322051 - 2³ = 2145322043 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2145322057) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 386881 + ... + 392386.

It is an arithmetic number, because the mean of its divisors is an integer number (536526018).

Almost surely, 2^2145322051 is an apocalyptic number.

2145322051 is a deficient number, since it is larger than the sum of its proper divisors (782021).

2145322051 is an equidigital number, since it uses as much as digits as its factorization.

2145322051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 782020.

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 2145322051 is about 46317.6213875454. The cubic root of 2145322051 is about 1289.7261303914.

Adding to 2145322051 its reverse (1502235412), we get a palindrome (3647557463).

The spelling of 2145322051 in words is "two billion, one hundred forty-five million, three hundred twenty-two thousand, fifty-one".