55515293 has 2 divisors, whose sum is σ = 55515294. Its totient is φ = 55515292.

The previous prime is 55515269. The next prime is 55515373. The reversal of 55515293 is 39251555.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 51008164 + 4507129 = 7142^2 + 2123^2 .

It is a cyclic number.

It is not a de Polignac number, because 55515293 - 2¹⁰ = 55514269 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55515223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27757646 + 27757647.

It is an arithmetic number, because the mean of its divisors is an integer number (27757647).

Almost surely, 2^55515293 is an apocalyptic number.

It is an amenable number.

55515293 is a deficient number, since it is larger than the sum of its proper divisors (1).

55515293 is an equidigital number, since it uses as much as digits as its factorization.

55515293 is an evil number, because the sum of its binary digits is even.

The product of its digits is 33750, while the sum is 35.

The square root of 55515293 is about 7450.8585411347. The cubic root of 55515293 is about 381.4792136659.

The spelling of 55515293 in words is "fifty-five million, five hundred fifteen thousand, two hundred ninety-three".