2145332203551 has 24 divisors (see below), whose sum is σ = 3164848137984. Its totient is φ = 1399745774160.

The previous prime is 2145332203549. The next prime is 2145332203589. The reversal of 2145332203551 is 1553022335412.

2145332203551 is a `hidden beast` number, since 2 + 1 + 4 + 53 + 32 + 20 + 3 + 551 = 666.

It is not a de Polignac number, because 2145332203551 - 2¹ = 2145332203549 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2145332203591) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 17285820 + ... + 17409486.

It is an arithmetic number, because the mean of its divisors is an integer number (131868672416).

Almost surely, 2^{2145332203551} is an apocalyptic number.

2145332203551 is a deficient number, since it is larger than the sum of its proper divisors (1019515934433).

2145332203551 is a wasteful number, since it uses less digits than its factorization.

2145332203551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164731 (or 164728 counting only the distinct ones).

The product of its (nonzero) digits is 108000, while the sum is 36.

Adding to 2145332203551 its reverse (1553022335412), we get a palindrome (3698354538963).

The spelling of 2145332203551 in words is "two trillion, one hundred forty-five billion, three hundred thirty-two million, two hundred three thousand, five hundred fifty-one".