55533021345 has 24 divisors (see below), whose sum is σ = 96533073000. Its totient is φ = 29532738816.

The previous prime is 55533021329. The next prime is 55533021361. The reversal of 55533021345 is 54312033555.

55533021345 is a `hidden beast` number, since 5 + 5 + 5 + 3 + 302 + 1 + 345 = 666.

It is an interprime number because it is at equal distance from previous prime (55533021329) and next prime (55533021361).

It can be written as a sum of positive squares in 4 ways, for example, as 21155411601 + 34377609744 = 145449^2 + 185412^2 .

It is not a de Polignac number, because 55533021345 - 2⁴ = 55533021329 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1752300 + ... + 1783709.

It is an arithmetic number, because the mean of its divisors is an integer number (4022211375).

Almost surely, 2^55533021345 is an apocalyptic number.

It is an amenable number.

55533021345 is a deficient number, since it is larger than the sum of its proper divisors (41000051655).

55533021345 is a wasteful number, since it uses less digits than its factorization.

55533021345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3536369 (or 3536366 counting only the distinct ones).

The product of its (nonzero) digits is 135000, while the sum is 36.

It can be divided in two parts, 555330 and 21345, that added together give a palindrome (576675).

The spelling of 55533021345 in words is "fifty-five billion, five hundred thirty-three million, twenty-one thousand, three hundred forty-five".