55002581 has 2 divisors, whose sum is σ = 55002582. Its totient is φ = 55002580.

The previous prime is 55002553. The next prime is 55002611. The reversal of 55002581 is 18520055.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 50836900 + 4165681 = 7130^2 + 2041^2 .

It is a cyclic number.

It is not a de Polignac number, because 55002581 - 2⁶ = 55002517 is a prime.

It is a super-2 number, since 2×55002581² = 6050567833323122, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 55002581.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55008581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27501290 + 27501291.

It is an arithmetic number, because the mean of its divisors is an integer number (27501291).

Almost surely, 2^55002581 is an apocalyptic number.

It is an amenable number.

55002581 is a deficient number, since it is larger than the sum of its proper divisors (1).

55002581 is an equidigital number, since it uses as much as digits as its factorization.

55002581 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2000, while the sum is 26.

The square root of 55002581 is about 7416.3724960387. The cubic root of 55002581 is about 380.3011947227.

The spelling of 55002581 in words is "fifty-five million, two thousand, five hundred eighty-one".