133251930 has 96 divisors (see below), whose sum is σ = 397972224. Its totient is φ = 30302208.

The previous prime is 133251893. The next prime is 133251931. The reversal of 133251930 is 39152331.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 133251894 and 133251903.

It is not an unprimeable number, because it can be changed into a prime (133251931) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 161499 + ... + 162321.

It is an arithmetic number, because the mean of its divisors is an integer number (4145544).

Almost surely, 2^133251930 is an apocalyptic number.

133251930 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 133251930, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (198986112).

133251930 is an abundant number, since it is smaller than the sum of its proper divisors (264720294).

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

133251930 is a wasteful number, since it uses less digits than its factorization.

133251930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1100 (or 1097 counting only the distinct ones).

The product of its (nonzero) digits is 2430, while the sum is 27.

The square root of 133251930 is about 11543.4799778923. The cubic root of 133251930 is about 510.7689668601.

The spelling of 133251930 in words is "one hundred thirty-three million, two hundred fifty-one thousand, nine hundred thirty".