31224101 has 4 divisors (see below), whose sum is σ = 31314432. Its totient is φ = 31133772.

The previous prime is 31224091. The next prime is 31224113. The reversal of 31224101 is 10142213.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 10142213 = 859 ⋅11807.

It is a cyclic number.

It is not a de Polignac number, because 31224101 - 2¹⁴ = 31207717 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 (31224301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44645 + ... + 45338.

It is an arithmetic number, because the mean of its divisors is an integer number (7828608).

Almost surely, 2^31224101 is an apocalyptic number.

It is an amenable number.

31224101 is a deficient number, since it is larger than the sum of its proper divisors (90331).

31224101 is an equidigital number, since it uses as much as digits as its factorization.

31224101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90330.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 31224101 is about 5587.8529866130. The cubic root of 31224101 is about 314.8932232368.

Adding to 31224101 its reverse (10142213), we get a palindrome (41366314).

The spelling of 31224101 in words is "thirty-one million, two hundred twenty-four thousand, one hundred one".