1081647231 has 16 divisors (see below), whose sum is σ = 1648839168. Its totient is φ = 617853600.

The previous prime is 1081647227. The next prime is 1081647239. The reversal of 1081647231 is 1327461801.

It is not a de Polignac number, because 1081647231 - 2² = 1081647227 is a prime.

It is a super-2 number, since 2×1081647231² = 2339921464659934722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1081647192 and 1081647201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1081647239) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 59646 + ... + 75636.

It is an arithmetic number, because the mean of its divisors is an integer number (103052448).

Almost surely, 2^1081647231 is an apocalyptic number.

1081647231 is a deficient number, since it is larger than the sum of its proper divisors (567191937).

1081647231 is a wasteful number, since it uses less digits than its factorization.

1081647231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19222.

The product of its (nonzero) digits is 8064, while the sum is 33.

The square root of 1081647231 is about 32888.4057229900. The cubic root of 1081647231 is about 1026.5069188513.

The spelling of 1081647231 in words is "one billion, eighty-one million, six hundred forty-seven thousand, two hundred thirty-one".