133631000 has 32 divisors (see below), whose sum is σ = 312698880. Its totient is φ = 53452000.

The previous prime is 133630997. The next prime is 133631023. The reversal of 133631000 is 136331.

It is a super-2 number, since 2×133631000² = 35714488322000000, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 133631000.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65816 + ... + 67815.

It is an arithmetic number, because the mean of its divisors is an integer number (9771840).

Almost surely, 2^133631000 is an apocalyptic number.

133631000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

133631000 is an abundant number, since it is smaller than the sum of its proper divisors (179067880).

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

133631000 is a wasteful number, since it uses less digits than its factorization.

133631000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133652 (or 133638 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 17.

The square root of 133631000 is about 11559.8875427056. The cubic root of 133631000 is about 511.2528469901.

Adding to 133631000 its reverse (136331), we get a palindrome (133767331).

The spelling of 133631000 in words is "one hundred thirty-three million, six hundred thirty-one thousand".