31272661 has 8 divisors (see below), whose sum is σ = 35798400. Its totient is φ = 26761488.

The previous prime is 31272641. The next prime is 31272667. The reversal of 31272661 is 16627213.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 31272661 - 2⁵ = 31272629 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31272667) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1440 + ... + 8038.

It is an arithmetic number, because the mean of its divisors is an integer number (4474800).

Almost surely, 2^31272661 is an apocalyptic number.

It is an amenable number.

31272661 is a deficient number, since it is larger than the sum of its proper divisors (4525739).

31272661 is an equidigital number, since it uses as much as digits as its factorization.

31272661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7283.

The product of its digits is 3024, while the sum is 28.

The square root of 31272661 is about 5592.1964378945. The cubic root of 31272661 is about 315.0563802668.

Adding to 31272661 its reverse (16627213), we get a palindrome (47899874).

The spelling of 31272661 in words is "thirty-one million, two hundred seventy-two thousand, six hundred sixty-one".