31214261 has 8 divisors (see below), whose sum is σ = 35592984. Its totient is φ = 27118080.

The previous prime is 31214233. The next prime is 31214263. The reversal of 31214261 is 16241213.

It can be written as a sum of positive squares in 4 ways, for example, as 9302500 + 21911761 = 3050^2 + 4681^2 .

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 31214261 - 2¹⁴ = 31197877 is a prime.

It is a super-2 number, since 2×31214261² = 1948660179552242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31214263) 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, 70400 + ... + 70841.

It is an arithmetic number, because the mean of its divisors is an integer number (4449123).

Almost surely, 2^31214261 is an apocalyptic number.

It is an amenable number.

31214261 is a deficient number, since it is larger than the sum of its proper divisors (4378723).

31214261 is a wasteful number, since it uses less digits than its factorization.

31214261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141271.

The product of its digits is 288, while the sum is 20.

The square root of 31214261 is about 5586.9724359442. The cubic root of 31214261 is about 314.8601411542.

Adding to 31214261 its reverse (16241213), we get a palindrome (47455474).

The spelling of 31214261 in words is "thirty-one million, two hundred fourteen thousand, two hundred sixty-one".