82123455 has 16 divisors (see below), whose sum is σ = 137111040. Its totient is φ = 41894688.

The previous prime is 82123439. The next prime is 82123471. The reversal of 82123455 is 55432128.

It is an interprime number because it is at equal distance from previous prime (82123439) and next prime (82123471).

It is not a de Polignac number, because 82123455 - 2⁴ = 82123439 is a prime.

It is a super-2 number, since 2×82123455² = 13488523722274050, which contains 22 as substring.

It is a congruent 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, 118675 + ... + 119364.

It is an arithmetic number, because the mean of its divisors is an integer number (8569440).

Almost surely, 2^82123455 is an apocalyptic number.

82123455 is a deficient number, since it is larger than the sum of its proper divisors (54987585).

82123455 is a wasteful number, since it uses less digits than its factorization.

82123455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238070.

The product of its digits is 9600, while the sum is 30.

The square root of 82123455 is about 9062.1992363885. The cubic root of 82123455 is about 434.6660668780. Note that the first 3 decimals are identical.

The spelling of 82123455 in words is "eighty-two million, one hundred twenty-three thousand, four hundred fifty-five".