133304540 has 48 divisors (see below), whose sum is σ = 289632672. Its totient is φ = 51507456.

The previous prime is 133304539. The next prime is 133304543. The reversal of 133304540 is 45403331.

It is a super-2 number, since 2×133304540² = 35540200769223200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133304543) 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, 70082 + ... + 71958.

It is an arithmetic number, because the mean of its divisors is an integer number (6034014).

Almost surely, 2^133304540 is an apocalyptic number.

133304540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

133304540 is an abundant number, since it is smaller than the sum of its proper divisors (156328132).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

133304540 is a wasteful number, since it uses less digits than its factorization.

133304540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2006 (or 2004 counting only the distinct ones).

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

The square root of 133304540 is about 11545.7585285680. The cubic root of 133304540 is about 510.8361779434.

Adding to 133304540 its reverse (45403331), we get a palindrome (178707871).

The spelling of 133304540 in words is "one hundred thirty-three million, three hundred four thousand, five hundred forty".