2145144322551 has 4 divisors (see below), whose sum is σ = 2860192430072. Its totient is φ = 1430096215032.

The previous prime is 2145144322513. The next prime is 2145144322561. The reversal of 2145144322551 is 1552234415412.

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

It is not a de Polignac number, because 2145144322551 - 2⁹ = 2145144322039 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2145144322561) 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, 357524053756 + ... + 357524053761.

It is an arithmetic number, because the mean of its divisors is an integer number (715048107518).

Almost surely, 2^{2145144322551} is an apocalyptic number.

2145144322551 is a deficient number, since it is larger than the sum of its proper divisors (715048107521).

2145144322551 is an equidigital number, since it uses as much as digits as its factorization.

2145144322551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 715048107520.

The product of its digits is 192000, while the sum is 39.

Adding to 2145144322551 its reverse (1552234415412), we get a palindrome (3697378737963).

The spelling of 2145144322551 in words is "two trillion, one hundred forty-five billion, one hundred forty-four million, three hundred twenty-two thousand, five hundred fifty-one".