82151133 has 4 divisors (see below), whose sum is σ = 109534848. Its totient is φ = 54767420.

The previous prime is 82151131. The next prime is 82151177. The reversal of 82151133 is 33115128.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 82151133 - 2¹ = 82151131 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82151131) 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, 13691853 + ... + 13691858.

It is an arithmetic number, because the mean of its divisors is an integer number (27383712).

Almost surely, 2^82151133 is an apocalyptic number.

It is an amenable number.

82151133 is a deficient number, since it is larger than the sum of its proper divisors (27383715).

82151133 is a wasteful number, since it uses less digits than its factorization.

82151133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27383714.

The product of its digits is 720, while the sum is 24.

The square root of 82151133 is about 9063.7262204901. The cubic root of 82151133 is about 434.7148931079.

The spelling of 82151133 in words is "eighty-two million, one hundred fifty-one thousand, one hundred thirty-three".