255540031 has 2 divisors, whose sum is σ = 255540032. Its totient is φ = 255540030.

The previous prime is 255540011. The next prime is 255540049. The reversal of 255540031 is 130045552.

255540031 is nontrivially palindromic in base 16.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 255540031 - 2²⁷ = 121322303 is a prime.

It is a super-2 number, since 2×255540031² = 130601414886961922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 255539978 and 255540005.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (255540011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127770015 + 127770016.

It is an arithmetic number, because the mean of its divisors is an integer number (127770016).

Almost surely, 2^255540031 is an apocalyptic number.

255540031 is a deficient number, since it is larger than the sum of its proper divisors (1).

255540031 is an equidigital number, since it uses as much as digits as its factorization.

255540031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3000, while the sum is 25.

The square root of 255540031 is about 15985.6195062938. The cubic root of 255540031 is about 634.5799035922.

Adding to 255540031 its reverse (130045552), we get a palindrome (385585583).

The spelling of 255540031 in words is "two hundred fifty-five million, five hundred forty thousand, thirty-one".