31241421 has 12 divisors (see below), whose sum is σ = 45574620. Its totient is φ = 20620800.

The previous prime is 31241411. The next prime is 31241443. The reversal of 31241421 is 12414213.

31241421 is a `hidden beast` number, since 3 + 1 + 241 + 421 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 30404196 + 837225 = 5514^2 + 915^2 .

It is not a de Polignac number, because 31241421 - 2⁵ = 31241389 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31241394 and 31241403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31241401) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16276 + ... + 18093.

It is an arithmetic number, because the mean of its divisors is an integer number (3797885).

Almost surely, 2^31241421 is an apocalyptic number.

It is an amenable number.

31241421 is a deficient number, since it is larger than the sum of its proper divisors (14333199).

31241421 is a wasteful number, since it uses less digits than its factorization.

31241421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34476 (or 34473 counting only the distinct ones).

The product of its digits is 192, while the sum is 18.

The square root of 31241421 is about 5589.4025619918. The cubic root of 31241421 is about 314.9514362019.

Adding to 31241421 its reverse (12414213), we get a palindrome (43655634).

The spelling of 31241421 in words is "thirty-one million, two hundred forty-one thousand, four hundred twenty-one".