31413421 has 8 divisors (see below), whose sum is σ = 34655544. Its totient is φ = 28289280.

The previous prime is 31413401. The next prime is 31413427. The reversal of 31413421 is 12431413.

It can be written as a sum of positive squares in 4 ways, for example, as 5546025 + 25867396 = 2355^2 + 5086^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 31413421 - 2¹⁵ = 31380653 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31413427) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28936 + ... + 30001.

It is an arithmetic number, because the mean of its divisors is an integer number (4331943).

Almost surely, 2^31413421 is an apocalyptic number.

It is an amenable number.

31413421 is a deficient number, since it is larger than the sum of its proper divisors (3242123).

31413421 is a wasteful number, since it uses less digits than its factorization.

31413421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58991.

The product of its digits is 288, while the sum is 19.

The square root of 31413421 is about 5604.7677025904. The cubic root of 31413421 is about 315.5283683008.

Adding to 31413421 its reverse (12431413), we get a palindrome (43844834).

The spelling of 31413421 in words is "thirty-one million, four hundred thirteen thousand, four hundred twenty-one".