133251916 has 24 divisors (see below), whose sum is σ = 282181536. Its totient is φ = 53748480.

The previous prime is 133251893. The next prime is 133251931. The reversal of 133251916 is 619152331.

It is a happy 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, 139495 + ... + 140446.

It is an arithmetic number, because the mean of its divisors is an integer number (11757564).

Almost surely, 2^133251916 is an apocalyptic number.

It is an amenable number.

133251916 is an abundant number, since it is smaller than the sum of its proper divisors (148929620).

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

133251916 is a wasteful number, since it uses less digits than its factorization.

133251916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 279969 (or 279967 counting only the distinct ones).

The product of its digits is 4860, while the sum is 31.

The square root of 133251916 is about 11543.4793714893. The cubic root of 133251916 is about 510.7689489723.

The spelling of 133251916 in words is "one hundred thirty-three million, two hundred fifty-one thousand, nine hundred sixteen".