133031400 has 48 divisors (see below), whose sum is σ = 412399200. Its totient is φ = 35474880.

The previous prime is 133031377. The next prime is 133031419. The reversal of 133031400 is 4130331.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 133031400.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 110260 + ... + 111459.

It is an arithmetic number, because the mean of its divisors is an integer number (8591650).

Almost surely, 2^133031400 is an apocalyptic number.

133031400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

133031400 is an abundant number, since it is smaller than the sum of its proper divisors (279367800).

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

133031400 is a wasteful number, since it uses less digits than its factorization.

133031400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221738 (or 221729 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 15.

The square root of 133031400 is about 11533.9238769813. The cubic root of 133031400 is about 510.4870395450.

Adding to 133031400 its reverse (4130331), we get a palindrome (137161731).

The spelling of 133031400 in words is "one hundred thirty-three million, thirty-one thousand, four hundred".