133420503 has 16 divisors (see below), whose sum is σ = 184744800. Its totient is φ = 85545600.

The previous prime is 133420501. The next prime is 133420513. The reversal of 133420503 is 305024331.

It is not a de Polignac number, because 133420503 - 2¹ = 133420501 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 133420503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133420501) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20553 + ... + 26253.

It is an arithmetic number, because the mean of its divisors is an integer number (11546550).

Almost surely, 2^133420503 is an apocalyptic number.

133420503 is a deficient number, since it is larger than the sum of its proper divisors (51324297).

133420503 is a wasteful number, since it uses less digits than its factorization.

133420503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6002.

The product of its (nonzero) digits is 1080, while the sum is 21.

The square root of 133420503 is about 11550.7793243573. The cubic root of 133420503 is about 510.9842622390.

Adding to 133420503 its reverse (305024331), we get a palindrome (438444834).

The spelling of 133420503 in words is "one hundred thirty-three million, four hundred twenty thousand, five hundred three".