133213244 has 12 divisors (see below), whose sum is σ = 234609144. Its totient is φ = 66182064.

The previous prime is 133213229. The next prime is 133213259. The reversal of 133213244 is 442312331.

It is an interprime number because it is at equal distance from previous prime (133213229) and next prime (133213259).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 105434 + ... + 106689.

It is an arithmetic number, because the mean of its divisors is an integer number (19550762).

Almost surely, 2^133213244 is an apocalyptic number.

It is an amenable number.

133213244 is a deficient number, since it is larger than the sum of its proper divisors (101395900).

133213244 is a wasteful number, since it uses less digits than its factorization.

133213244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 212284 (or 212282 counting only the distinct ones).

The product of its digits is 1728, while the sum is 23.

The square root of 133213244 is about 11541.8041917198. The cubic root of 133213244 is about 510.7195328775.

Adding to 133213244 its reverse (442312331), we get a palindrome (575525575).

The spelling of 133213244 in words is "one hundred thirty-three million, two hundred thirteen thousand, two hundred forty-four".