133020231 has 16 divisors (see below), whose sum is σ = 179159040. Its totient is φ = 87786080.

The previous prime is 133020229. The next prime is 133020241. The reversal of 133020231 is 132020331.

It is a cyclic number.

It is not a de Polignac number, because 133020231 - 2¹ = 133020229 is a prime.

It is a super-2 number, since 2×133020231² = 35388763710586722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 133020231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133020241) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 153706 + ... + 154568.

It is an arithmetic number, because the mean of its divisors is an integer number (11197440).

Almost surely, 2^133020231 is an apocalyptic number.

133020231 is a deficient number, since it is larger than the sum of its proper divisors (46138809).

133020231 is a wasteful number, since it uses less digits than its factorization.

133020231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1326.

The product of its (nonzero) digits is 108, while the sum is 15.

The square root of 133020231 is about 11533.4396864075. The cubic root of 133020231 is about 510.4727527192.

Adding to 133020231 its reverse (132020331), we get a palindrome (265040562).

The spelling of 133020231 in words is "one hundred thirty-three million, twenty thousand, two hundred thirty-one".