31962421 has 2 divisors, whose sum is σ = 31962422. Its totient is φ = 31962420.

The previous prime is 31962409. The next prime is 31962439. The reversal of 31962421 is 12426913.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24860196 + 7102225 = 4986^2 + 2665^2 .

It is an emirp because it is prime and its reverse (12426913) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31962421 - 2¹³ = 31954229 is a prime.

It is a super-3 number, since 3×31962421³ (a number of 23 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 31962421.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31962401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15981210 + 15981211.

It is an arithmetic number, because the mean of its divisors is an integer number (15981211).

Almost surely, 2^31962421 is an apocalyptic number.

It is an amenable number.

31962421 is a deficient number, since it is larger than the sum of its proper divisors (1).

31962421 is an equidigital number, since it uses as much as digits as its factorization.

31962421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2592, while the sum is 28.

The square root of 31962421 is about 5653.5317280440. The cubic root of 31962421 is about 317.3558847470.

The spelling of 31962421 in words is "thirty-one million, nine hundred sixty-two thousand, four hundred twenty-one".