420133523 has 4 divisors (see below), whose sum is σ = 420182328. Its totient is φ = 420084720.

The previous prime is 420133507. The next prime is 420133541. The reversal of 420133523 is 325331024.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 420133523 - 2⁴ = 420133507 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (420133543) 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, 7661 + ... + 29982.

It is an arithmetic number, because the mean of its divisors is an integer number (105045582).

Almost surely, 2^420133523 is an apocalyptic number.

420133523 is a deficient number, since it is larger than the sum of its proper divisors (48805).

420133523 is a wasteful number, since it uses less digits than its factorization.

420133523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48804.

The product of its (nonzero) digits is 2160, while the sum is 23.

The square root of 420133523 is about 20497.1589006867. The cubic root of 420133523 is about 748.9665903697.

Adding to 420133523 its reverse (325331024), we get a palindrome (745464547).

The spelling of 420133523 in words is "four hundred twenty million, one hundred thirty-three thousand, five hundred twenty-three".