255215031 has 4 divisors (see below), whose sum is σ = 340286712. Its totient is φ = 170143352.

The previous prime is 255215021. The next prime is 255215053. The reversal of 255215031 is 130512552.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 255215031 - 2¹⁹ = 254690743 is a prime.

It is a super-2 number, since 2×255215031² = 130269424096661922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 255214992 and 255215010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255215021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42535836 + ... + 42535841.

It is an arithmetic number, because the mean of its divisors is an integer number (85071678).

Almost surely, 2^255215031 is an apocalyptic number.

255215031 is a deficient number, since it is larger than the sum of its proper divisors (85071681).

255215031 is an equidigital number, since it uses as much as digits as its factorization.

255215031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85071680.

The product of its (nonzero) digits is 1500, while the sum is 24.

The square root of 255215031 is about 15975.4508856558. The cubic root of 255215031 is about 634.3107664213.

Adding to 255215031 its reverse (130512552), we get a palindrome (385727583).

The spelling of 255215031 in words is "two hundred fifty-five million, two hundred fifteen thousand, thirty-one".