133631022 has 16 divisors (see below), whose sum is σ = 305442432. Its totient is φ = 38180280.

The previous prime is 133630997. The next prime is 133631023. The reversal of 133631022 is 220136331.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 133631022.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133631023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1590804 + ... + 1590887.

It is an arithmetic number, because the mean of its divisors is an integer number (19090152).

Almost surely, 2^133631022 is an apocalyptic number.

133631022 is an abundant number, since it is smaller than the sum of its proper divisors (171811410).

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

133631022 is a wasteful number, since it uses less digits than its factorization.

133631022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3181703.

The product of its (nonzero) digits is 648, while the sum is 21.

The square root of 133631022 is about 11559.8884942719. Note that the first 3 decimals coincide. The cubic root of 133631022 is about 511.2528750464.

Adding to 133631022 its reverse (220136331), we get a palindrome (353767353).

The spelling of 133631022 in words is "one hundred thirty-three million, six hundred thirty-one thousand, twenty-two".