31410421 has 12 divisors (see below), whose sum is σ = 36880140. Its totient is φ = 26671680.

The previous prime is 31410413. The next prime is 31410473. The reversal of 31410421 is 12401413.

It can be written as a sum of positive squares in 2 ways, for example, as 24147396 + 7263025 = 4914^2 + 2695^2 .

It is not a de Polignac number, because 31410421 - 2³ = 31410413 is a prime.

It is a super-2 number, since 2×31410421² = 1973229094794482, which contains 22 as substring.

It is the 5605-th Hogben number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31410395 and 31410404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31410481) by changing a digit.

It is a nontrivial repunit in base 5604.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2401 + ... + 8281.

It is an arithmetic number, because the mean of its divisors is an integer number (3073345).

Almost surely, 2^31410421 is an apocalyptic number.

It is an amenable number.

31410421 is a deficient number, since it is larger than the sum of its proper divisors (5469719).

31410421 is a wasteful number, since it uses less digits than its factorization.

31410421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6004 (or 5997 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 31410421 is about 5604.5000669105. The cubic root of 31410421 is about 315.5183236001.

Adding to 31410421 its reverse (12401413), we get a palindrome (43811834).

The spelling of 31410421 in words is "thirty-one million, four hundred ten thousand, four hundred twenty-one".