1081317531 has 32 divisors (see below), whose sum is σ = 1738240000. Its totient is φ = 584094240.

The previous prime is 1081317527. The next prime is 1081317533. The reversal of 1081317531 is 1357131801.

It is not a de Polignac number, because 1081317531 - 2² = 1081317527 is a prime.

It is a super-2 number, since 2×1081317531² = 2338495205695871922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1081317533) 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, 196386 + ... + 201816.

It is an arithmetic number, because the mean of its divisors is an integer number (54320000).

Almost surely, 2^1081317531 is an apocalyptic number.

1081317531 is a deficient number, since it is larger than the sum of its proper divisors (656922469).

1081317531 is a wasteful number, since it uses less digits than its factorization.

1081317531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5959.

The product of its (nonzero) digits is 2520, while the sum is 30.

The square root of 1081317531 is about 32883.3929362528. The cubic root of 1081317531 is about 1026.4026107448.

The spelling of 1081317531 in words is "one billion, eighty-one million, three hundred seventeen thousand, five hundred thirty-one".