133251305 has 16 divisors (see below), whose sum is σ = 182024064. Its totient is φ = 92695680.

The previous prime is 133251289. The next prime is 133251329. The reversal of 133251305 is 503152331.

It is not a de Polignac number, because 133251305 - 2⁴ = 133251289 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51404 + ... + 53933.

It is an arithmetic number, because the mean of its divisors is an integer number (11376504).

Almost surely, 2^133251305 is an apocalyptic number.

It is an amenable number.

133251305 is a deficient number, since it is larger than the sum of its proper divisors (48772759).

133251305 is a wasteful number, since it uses less digits than its factorization.

133251305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105376.

The product of its (nonzero) digits is 1350, while the sum is 23.

The square root of 133251305 is about 11543.4529063015. The cubic root of 133251305 is about 510.7681682948.

The spelling of 133251305 in words is "one hundred thirty-three million, two hundred fifty-one thousand, three hundred five".