1081431236 has 24 divisors (see below), whose sum is σ = 1920318624. Its totient is φ = 532803200.

The previous prime is 1081431223. The next prime is 1081431269. The reversal of 1081431236 is 6321341801.

It is a junction number, because it is equal to n+sod(n) for n = 1081431199 and 1081431208.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 129071 + ... + 137193.

It is an arithmetic number, because the mean of its divisors is an integer number (80013276).

Almost surely, 2^1081431236 is an apocalyptic number.

It is an amenable number.

1081431236 is a deficient number, since it is larger than the sum of its proper divisors (838887388).

1081431236 is a wasteful number, since it uses less digits than its factorization.

1081431236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8611 (or 8609 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 1081431236 is about 32885.1218030282. The cubic root of 1081431236 is about 1026.4385863070.

The spelling of 1081431236 in words is "one billion, eighty-one million, four hundred thirty-one thousand, two hundred thirty-six".