82170451 has 8 divisors (see below), whose sum is σ = 92063664. Its totient is φ = 72681120.

The previous prime is 82170449. The next prime is 82170499. The reversal of 82170451 is 15407128.

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 82170451 - 2¹ = 82170449 is a prime.

It is not an unprimeable number, because it can be changed into a prime (82170551) 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, 100540 + ... + 101353.

It is an arithmetic number, because the mean of its divisors is an integer number (11507958).

Almost surely, 2^82170451 is an apocalyptic number.

82170451 is a deficient number, since it is larger than the sum of its proper divisors (9893213).

82170451 is a wasteful number, since it uses less digits than its factorization.

82170451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201941.

The product of its (nonzero) digits is 2240, while the sum is 28.

The square root of 82170451 is about 9064.7918343446. The cubic root of 82170451 is about 434.7489651238.

Adding to 82170451 its reverse (15407128), we get a palindrome (97577579).

It can be divided in two parts, 82170 and 451, that added together give a triangular number (82621 = T₄₀₆).

The spelling of 82170451 in words is "eighty-two million, one hundred seventy thousand, four hundred fifty-one".