31161648 has 60 divisors (see below), whose sum is σ = 93651000. Its totient is φ = 8902656.

The previous prime is 31161643. The next prime is 31161649. The reversal of 31161648 is 84616113.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31161643) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4273 + ... + 8976.

It is an arithmetic number, because the mean of its divisors is an integer number (1560850).

Almost surely, 2^31161648 is an apocalyptic number.

It is an amenable number.

31161648 is an abundant number, since it is smaller than the sum of its proper divisors (62489352).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31161648 is a wasteful number, since it uses less digits than its factorization.

31161648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13274 (or 13261 counting only the distinct ones).

The product of its digits is 3456, while the sum is 30.

The square root of 31161648 is about 5582.2619071484. The cubic root of 31161648 is about 314.6831381623.

The spelling of 31161648 in words is "thirty-one million, one hundred sixty-one thousand, six hundred forty-eight".