133251630 has 16 divisors (see below), whose sum is σ = 319803984. Its totient is φ = 35533760.

The previous prime is 133251583. The next prime is 133251631. The reversal of 133251630 is 36152331.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 133251630.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133251631) 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, 2220831 + ... + 2220890.

It is an arithmetic number, because the mean of its divisors is an integer number (19987749).

Almost surely, 2^133251630 is an apocalyptic number.

133251630 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

133251630 is an abundant number, since it is smaller than the sum of its proper divisors (186552354).

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

133251630 is a wasteful number, since it uses less digits than its factorization.

133251630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4441731.

The product of its (nonzero) digits is 1620, while the sum is 24.

The square root of 133251630 is about 11543.4669835366. The cubic root of 133251630 is about 510.7685835491.

The spelling of 133251630 in words is "one hundred thirty-three million, two hundred fifty-one thousand, six hundred thirty".