255620613 has 4 divisors (see below), whose sum is σ = 340827488. Its totient is φ = 170413740.

The previous prime is 255620591. The next prime is 255620621. The reversal of 255620613 is 316026552.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 255620613 - 2⁵ = 255620581 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255620633) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42603433 + ... + 42603438.

It is an arithmetic number, because the mean of its divisors is an integer number (85206872).

Almost surely, 2^255620613 is an apocalyptic number.

It is an amenable number.

255620613 is a deficient number, since it is larger than the sum of its proper divisors (85206875).

255620613 is an equidigital number, since it uses as much as digits as its factorization.

255620613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85206874.

The product of its (nonzero) digits is 10800, while the sum is 30.

The square root of 255620613 is about 15988.1397604599. The cubic root of 255620613 is about 634.6465993965.

The spelling of 255620613 in words is "two hundred fifty-five million, six hundred twenty thousand, six hundred thirteen".