82195921 has 8 divisors (see below), whose sum is σ = 83232000. Its totient is φ = 81164400.

The previous prime is 82195913. The next prime is 82195943. The reversal of 82195921 is 12959128.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 82195921 - 2³ = 82195913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82195021) 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, 47530 + ... + 49228.

It is an arithmetic number, because the mean of its divisors is an integer number (10404000).

Almost surely, 2^82195921 is an apocalyptic number.

It is an amenable number.

82195921 is a deficient number, since it is larger than the sum of its proper divisors (1036079).

82195921 is a wasteful number, since it uses less digits than its factorization.

82195921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2279.

The product of its digits is 12960, while the sum is 37.

The square root of 82195921 is about 9066.1966115897. The cubic root of 82195921 is about 434.7938795349.

The spelling of 82195921 in words is "eighty-two million, one hundred ninety-five thousand, nine hundred twenty-one".