133212394 has 16 divisors (see below), whose sum is σ = 235731456. Its totient is φ = 55249200.

The previous prime is 133212319. The next prime is 133212397. The reversal of 133212394 is 493212331.

It is a super-2 number, since 2×133212394² = 35491083830422472, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (133212397) 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, 153037 + ... + 153904.

It is an arithmetic number, because the mean of its divisors is an integer number (14733216).

Almost surely, 2^133212394 is an apocalyptic number.

133212394 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

133212394 is a deficient number, since it is larger than the sum of its proper divisors (102519062).

133212394 is a wasteful number, since it uses less digits than its factorization.

133212394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 306981.

The product of its digits is 3888, while the sum is 28.

The square root of 133212394 is about 11541.7673689951. The cubic root of 133212394 is about 510.7184466178.

The spelling of 133212394 in words is "one hundred thirty-three million, two hundred twelve thousand, three hundred ninety-four".