552312781 has 2 divisors, whose sum is σ = 552312782. Its totient is φ = 552312780.

The previous prime is 552312773. The next prime is 552312791. The reversal of 552312781 is 187213255.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 550324681 + 1988100 = 23459^2 + 1410^2 .

It is a cyclic number.

It is not a de Polignac number, because 552312781 - 2³ = 552312773 is a prime.

It is a super-2 number, since 2×552312781² = 610098816111907922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (552312721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 276156390 + 276156391.

It is an arithmetic number, because the mean of its divisors is an integer number (276156391).

Almost surely, 2^552312781 is an apocalyptic number.

It is an amenable number.

552312781 is a deficient number, since it is larger than the sum of its proper divisors (1).

552312781 is an equidigital number, since it uses as much as digits as its factorization.

552312781 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16800, while the sum is 34.

The square root of 552312781 is about 23501.3357279964. The cubic root of 552312781 is about 820.4680953197.

The spelling of 552312781 in words is "five hundred fifty-two million, three hundred twelve thousand, seven hundred eighty-one".