31227161 has 12 divisors (see below), whose sum is σ = 36484560. Its totient is φ = 26649000.

The previous prime is 31227151. The next prime is 31227167. The reversal of 31227161 is 16172213.

It is not a de Polignac number, because 31227161 - 2¹⁰ = 31226137 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31227167) 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, 11030 + ... + 13568.

It is an arithmetic number, because the mean of its divisors is an integer number (3040380).

Almost surely, 2^31227161 is an apocalyptic number.

It is an amenable number.

31227161 is a deficient number, since it is larger than the sum of its proper divisors (5257399).

31227161 is a wasteful number, since it uses less digits than its factorization.

31227161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2804 (or 2797 counting only the distinct ones).

The product of its digits is 504, while the sum is 23.

The square root of 31227161 is about 5588.1267881107. The cubic root of 31227161 is about 314.9035095408.

Adding to 31227161 its reverse (16172213), we get a palindrome (47399374).

The spelling of 31227161 in words is "thirty-one million, two hundred twenty-seven thousand, one hundred sixty-one".