2145351251 has 4 divisors (see below), whose sum is σ = 2147707104. Its totient is φ = 2142995400.

The previous prime is 2145351223. The next prime is 2145351283. The reversal of 2145351251 is 1521535412.

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 2145351251 - 2¹⁰ = 2145350227 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2145851251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1176560 + ... + 1178381.

It is an arithmetic number, because the mean of its divisors is an integer number (536926776).

Almost surely, 2^2145351251 is an apocalyptic number.

2145351251 is a deficient number, since it is larger than the sum of its proper divisors (2355853).

2145351251 is an equidigital number, since it uses as much as digits as its factorization.

2145351251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2355852.

The product of its digits is 6000, while the sum is 29.

The square root of 2145351251 is about 46317.9366012779. The cubic root of 2145351251 is about 1289.7319818566.

Adding to 2145351251 its reverse (1521535412), we get a palindrome (3666886663).

The spelling of 2145351251 in words is "two billion, one hundred forty-five million, three hundred fifty-one thousand, two hundred fifty-one".