2151213024545 has 16 divisors (see below), whose sum is σ = 2782133738832. Its totient is φ = 1587385451520.

The previous prime is 2151213024431. The next prime is 2151213024547. The reversal of 2151213024545 is 5454203121512.

It can be written as a sum of positive squares in 8 ways, for example, as 4686223936 + 2146526800609 = 68456^2 + 1465103^2 .

It is not a de Polignac number, because 2151213024545 - 2¹⁰ = 2151213023521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2151213024547) 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, 12440852 + ... + 12612581.

It is an arithmetic number, because the mean of its divisors is an integer number (173883358677).

Almost surely, 2^{2151213024545} is an apocalyptic number.

It is an amenable number.

2151213024545 is a deficient number, since it is larger than the sum of its proper divisors (630920714287).

2151213024545 is a wasteful number, since it uses less digits than its factorization.

2151213024545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25054772.

The product of its (nonzero) digits is 48000, while the sum is 35.

The spelling of 2151213024545 in words is "two trillion, one hundred fifty-one billion, two hundred thirteen million, twenty-four thousand, five hundred forty-five".