31214730 has 32 divisors (see below), whose sum is σ = 77500800. Its totient is φ = 8036672.

The previous prime is 31214713. The next prime is 31214741. The reversal of 31214730 is 3741213.

It is a junction number, because it is equal to n+sod(n) for n = 31214697 and 31214706.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17070 + ... + 18809.

It is an arithmetic number, because the mean of its divisors is an integer number (2421900).

Almost surely, 2^31214730 is an apocalyptic number.

31214730 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

31214730 is an abundant number, since it is smaller than the sum of its proper divisors (46286070).

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

31214730 is a wasteful number, since it uses less digits than its factorization.

31214730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35918.

The product of its (nonzero) digits is 504, while the sum is 21.

The square root of 31214730 is about 5587.0144084296. The cubic root of 31214730 is about 314.8617180901.

Adding to 31214730 its reverse (3741213), we get a palindrome (34955943).

The spelling of 31214730 in words is "thirty-one million, two hundred fourteen thousand, seven hundred thirty".