31222201 has 8 divisors (see below), whose sum is σ = 33067584. Its totient is φ = 29417520.

The previous prime is 31222157. The next prime is 31222211. The reversal of 31222201 is 10222213.

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 31222201 - 2¹⁷ = 31091129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31222211) 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, 8590 + ... + 11671.

It is an arithmetic number, because the mean of its divisors is an integer number (4133448).

Almost surely, 2^31222201 is an apocalyptic number.

It is an amenable number.

31222201 is a deficient number, since it is larger than the sum of its proper divisors (1845383).

31222201 is a wasteful number, since it uses less digits than its factorization.

31222201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20351.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 31222201 is about 5587.6829723956. The cubic root of 31222201 is about 314.8868359778.

Adding to 31222201 its reverse (10222213), we get a palindrome (41444414).

The spelling of 31222201 in words is "thirty-one million, two hundred twenty-two thousand, two hundred one".