55512021145 has 16 divisors (see below), whose sum is σ = 76199846400. Its totient is φ = 38030848704.

The previous prime is 55512021133. The next prime is 55512021157. The reversal of 55512021145 is 54112021555.

55512021145 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (55512021133) and next prime (55512021157).

It is a cyclic number.

It is not a de Polignac number, because 55512021145 - 2¹³ = 55512012953 is a prime.

It is a super-2 number, since 2×55512021145² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 680370 + ... + 757579.

It is an arithmetic number, because the mean of its divisors is an integer number (4762490400).

Almost surely, 2^55512021145 is an apocalyptic number.

It is an amenable number.

55512021145 is a deficient number, since it is larger than the sum of its proper divisors (20687825255).

55512021145 is a wasteful number, since it uses less digits than its factorization.

55512021145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1439064.

The product of its (nonzero) digits is 10000, while the sum is 31.

The spelling of 55512021145 in words is "fifty-five billion, five hundred twelve million, twenty-one thousand, one hundred forty-five".