1255540031 has 4 divisors (see below), whose sum is σ = 1310128752. Its totient is φ = 1200951312.

The previous prime is 1255539991. The next prime is 1255540043. The reversal of 1255540031 is 1300455521.

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 1255540031 - 2²² = 1251345727 is a prime.

It is a super-2 number, since 2×1255540031² = 3152761538886961922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1255540081) 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, 27294326 + ... + 27294371.

It is an arithmetic number, because the mean of its divisors is an integer number (327532188).

Almost surely, 2^1255540031 is an apocalyptic number.

1255540031 is a deficient number, since it is larger than the sum of its proper divisors (54588721).

1255540031 is an equidigital number, since it uses as much as digits as its factorization.

1255540031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54588720.

The product of its (nonzero) digits is 3000, while the sum is 26.

The square root of 1255540031 is about 35433.6003110042. The cubic root of 1255540031 is about 1078.8064177158.

Adding to 1255540031 its reverse (1300455521), we get a palindrome (2555995552).

The spelling of 1255540031 in words is "one billion, two hundred fifty-five million, five hundred forty thousand, thirty-one".