31211214 has 16 divisors (see below), whose sum is σ = 62491728. Its totient is φ = 10392192.

The previous prime is 31211197. The next prime is 31211227. The reversal of 31211214 is 41211213.

It is a junction number, because it is equal to n+sod(n) for n = 31211193 and 31211202.

It is a congruent number.

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, 4374 + ... + 9030.

It is an arithmetic number, because the mean of its divisors is an integer number (3905733).

Almost surely, 2^31211214 is an apocalyptic number.

31211214 is an abundant number, since it is smaller than the sum of its proper divisors (31280514).

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

31211214 is a wasteful number, since it uses less digits than its factorization.

31211214 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5779.

The product of its digits is 48, while the sum is 15.

The square root of 31211214 is about 5586.6997413500. The cubic root of 31211214 is about 314.8498957296.

Adding to 31211214 its reverse (41211213), we get a palindrome (72422427).

Subtracting 31211214 from its reverse (41211213), we obtain a palindrome (9999999).

The spelling of 31211214 in words is "thirty-one million, two hundred eleven thousand, two hundred fourteen".