133433131 has 8 divisors (see below), whose sum is σ = 144212544. Its totient is φ = 122727360.

The previous prime is 133433129. The next prime is 133433159. The reversal of 133433131 is 131334331.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 133433131 - 2¹ = 133433129 is a prime.

It is a super-2 number, since 2×133433131² = 35608800896926322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (133433191) 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, 14611 + ... + 21916.

It is an arithmetic number, because the mean of its divisors is an integer number (18026568).

Almost surely, 2^133433131 is an apocalyptic number.

133433131 is the 7306-th heptagonal number.

133433131 is a deficient number, since it is larger than the sum of its proper divisors (10779413).

133433131 is a wasteful number, since it uses less digits than its factorization.

133433131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36821.

The product of its digits is 972, while the sum is 22.

The square root of 133433131 is about 11551.3259412069. The cubic root of 133433131 is about 511.0003829639. Note that the first 3 decimals are identical.

Adding to 133433131 its reverse (131334331), we get a palindrome (264767462).

The spelling of 133433131 in words is "one hundred thirty-three million, four hundred thirty-three thousand, one hundred thirty-one".