133356231 has 48 divisors (see below), whose sum is σ = 217002240. Its totient is φ = 78503040.

The previous prime is 133356229. The next prime is 133356233. The reversal of 133356231 is 132653331.

It is a happy number.

133356231 is a `hidden beast` number, since 1 + 3 + 3 + 35 + 623 + 1 = 666.

It is an interprime number because it is at equal distance from previous prime (133356229) and next prime (133356233).

It is not a de Polignac number, because 133356231 - 2¹ = 133356229 is a prime.

It is a super-2 number, since 2×133356231² = 35567768693050722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 133356195 and 133356204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133356233) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 160840 + ... + 161666.

It is an arithmetic number, because the mean of its divisors is an integer number (4520880).

Almost surely, 2^133356231 is an apocalyptic number.

133356231 is a deficient number, since it is larger than the sum of its proper divisors (83646009).

133356231 is a wasteful number, since it uses less digits than its factorization.

133356231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 916 (or 913 counting only the distinct ones).

The product of its digits is 4860, while the sum is 27.

The square root of 133356231 is about 11547.9968392791. The cubic root of 133356231 is about 510.9021977517.

The spelling of 133356231 in words is "one hundred thirty-three million, three hundred fifty-six thousand, two hundred thirty-one".