133496551 has 4 divisors (see below), whose sum is σ = 134721400. Its totient is φ = 132271704.

The previous prime is 133496537. The next prime is 133496567. The reversal of 133496551 is 155694331.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 133496551 - 2⁹ = 133496039 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 133496551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133496501) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 612261 + ... + 612478.

It is an arithmetic number, because the mean of its divisors is an integer number (33680350).

Almost surely, 2^133496551 is an apocalyptic number.

133496551 is a deficient number, since it is larger than the sum of its proper divisors (1224849).

133496551 is a wasteful number, since it uses less digits than its factorization.

133496551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1224848.

The product of its digits is 48600, while the sum is 37.

The square root of 133496551 is about 11554.0707545003. The cubic root of 133496551 is about 511.0813286556.

It can be divided in two parts, 13349 and 6551, that added together give a triangular number (19900 = T₁₉₉).

The spelling of 133496551 in words is "one hundred thirty-three million, four hundred ninety-six thousand, five hundred fifty-one".