1011255531 has 32 divisors (see below), whose sum is σ = 1599816960. Its totient is φ = 560112000.

The previous prime is 1011255517. The next prime is 1011255571. The reversal of 1011255531 is 1355521101.

1011255531 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1011255531 - 2⁷ = 1011255403 is a prime.

It is a super-2 number, since 2×1011255531² = 2045275497956183922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1011255571) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 31660 + ... + 54998.

It is an arithmetic number, because the mean of its divisors is an integer number (49994280).

Almost surely, 2^1011255531 is an apocalyptic number.

1011255531 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1011255531 is a deficient number, since it is larger than the sum of its proper divisors (588561429).

1011255531 is a wasteful number, since it uses less digits than its factorization.

1011255531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23467.

The product of its (nonzero) digits is 750, while the sum is 24.

The square root of 1011255531 is about 31800.2441971756. The cubic root of 1011255531 is about 1003.7378547010.

Adding to 1011255531 its reverse (1355521101), we get a palindrome (2366776632).

The spelling of 1011255531 in words is "one billion, eleven million, two hundred fifty-five thousand, five hundred thirty-one".