31421300 has 18 divisors (see below), whose sum is σ = 68184438. Its totient is φ = 12568480.

The previous prime is 31421279. The next prime is 31421309. The reversal of 31421300 is 312413.

It can be written as a sum of positive squares in 3 ways, for example, as 4443664 + 26977636 = 2108^2 + 5194^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31421309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 157007 + ... + 157206.

Almost surely, 2^31421300 is an apocalyptic number.

It is an amenable number.

31421300 is an abundant number, since it is smaller than the sum of its proper divisors (36763138).

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

31421300 is a wasteful number, since it uses less digits than its factorization.

31421300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 314227 (or 314220 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 31421300 is about 5605.4705422471. The cubic root of 31421300 is about 315.5547459882.

Adding to 31421300 its reverse (312413), we get a palindrome (31733713).

The spelling of 31421300 in words is "thirty-one million, four hundred twenty-one thousand, three hundred".