2145255251 has 16 divisors (see below), whose sum is σ = 2293457760. Its totient is φ = 2002963200.

The previous prime is 2145255179. The next prime is 2145255253. The reversal of 2145255251 is 1525525412.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 2145255251 - 2²⁶ = 2078146387 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2145255253) 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, 117431 + ... + 134463.

It is an arithmetic number, because the mean of its divisors is an integer number (143341110).

Almost surely, 2^2145255251 is an apocalyptic number.

2145255251 is a deficient number, since it is larger than the sum of its proper divisors (148202509).

2145255251 is a wasteful number, since it uses less digits than its factorization.

2145255251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17206.

The product of its digits is 20000, while the sum is 32.

The square root of 2145255251 is about 46316.9002740900. The cubic root of 2145255251 is about 1289.7127439630.

The spelling of 2145255251 in words is "two billion, one hundred forty-five million, two hundred fifty-five thousand, two hundred fifty-one".