133143400 has 96 divisors (see below), whose sum is σ = 341775000. Its totient is φ = 47923200.

The previous prime is 133143397. The next prime is 133143403. The reversal of 133143400 is 4341331.

It is an interprime number because it is at equal distance from previous prime (133143397) and next prime (133143403).

It can be written as a sum of positive squares in 12 ways, for example, as 9622404 + 123520996 = 3102^2 + 11114^2 .

It is not an unprimeable number, because it can be changed into a prime (133143403) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 105976 + ... + 107224.

Almost surely, 2^133143400 is an apocalyptic number.

133143400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 133143400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (170887500).

133143400 is an abundant number, since it is smaller than the sum of its proper divisors (208631600).

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

133143400 is a wasteful number, since it uses less digits than its factorization.

133143400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1319 (or 1310 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 133143400 is about 11538.7780982217. The cubic root of 133143400 is about 510.6302601449.

Adding to 133143400 its reverse (4341331), we get a palindrome (137484731).

It can be divided in two parts, 13 and 3143400, that added together give a palindrome (3143413).

The spelling of 133143400 in words is "one hundred thirty-three million, one hundred forty-three thousand, four hundred".