133251992 has 16 divisors (see below), whose sum is σ = 251106000. Its totient is φ = 66290400.

The previous prime is 133251991. The next prime is 133252037. The reversal of 133251992 is 299152331.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133251991) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40259 + ... + 43442.

It is an arithmetic number, because the mean of its divisors is an integer number (15694125).

Almost surely, 2^133251992 is an apocalyptic number.

It is an amenable number.

133251992 is a deficient number, since it is larger than the sum of its proper divisors (117854008).

133251992 is a wasteful number, since it uses less digits than its factorization.

133251992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83906 (or 83902 counting only the distinct ones).

The product of its digits is 14580, while the sum is 35.

The square root of 133251992 is about 11543.4826633906. The cubic root of 133251992 is about 510.7690460777.

The spelling of 133251992 in words is "one hundred thirty-three million, two hundred fifty-one thousand, nine hundred ninety-two".