31133201 has 4 divisors (see below), whose sum is σ = 33963504. Its totient is φ = 28302900.

The previous prime is 31133183. The next prime is 31133209. The reversal of 31133201 is 10233113.

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: 10233113 = 11 ⋅930283.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31133201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31133209) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1415135 + ... + 1415156.

It is an arithmetic number, because the mean of its divisors is an integer number (8490876).

Almost surely, 2^31133201 is an apocalyptic number.

It is an amenable number.

31133201 is a deficient number, since it is larger than the sum of its proper divisors (2830303).

31133201 is a wasteful number, since it uses less digits than its factorization.

31133201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2830302.

The product of its (nonzero) digits is 54, while the sum is 14.

The square root of 31133201 is about 5579.7133438914. The cubic root of 31133201 is about 314.5873525073.

Adding to 31133201 its reverse (10233113), we get a palindrome (41366314).

The spelling of 31133201 in words is "thirty-one million, one hundred thirty-three thousand, two hundred one".