31398214 has 4 divisors (see below), whose sum is σ = 47097324. Its totient is φ = 15699106.

The previous prime is 31398181. The next prime is 31398217. The reversal of 31398214 is 41289313.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 41289313 = 13 ⋅3176101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31398217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7849552 + ... + 7849555.

It is an arithmetic number, because the mean of its divisors is an integer number (11774331).

Almost surely, 2^31398214 is an apocalyptic number.

31398214 is a deficient number, since it is larger than the sum of its proper divisors (15699110).

31398214 is a wasteful number, since it uses less digits than its factorization.

31398214 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15699109.

The product of its digits is 5184, while the sum is 31.

The square root of 31398214 is about 5603.4109254989. The cubic root of 31398214 is about 315.4774451156.

The spelling of 31398214 in words is "thirty-one million, three hundred ninety-eight thousand, two hundred fourteen".