86722155 has 24 divisors (see below), whose sum is σ = 161882448. Its totient is φ = 42693696.

The previous prime is 86722147. The next prime is 86722157. The reversal of 86722155 is 55122768.

It is a happy number.

It is not a de Polignac number, because 86722155 - 2³ = 86722147 is a prime.

It is not an unprimeable number, because it can be changed into a prime (86722157) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 73537 + ... + 74706.

It is an arithmetic number, because the mean of its divisors is an integer number (6745102).

Almost surely, 2^86722155 is an apocalyptic number.

86722155 is a deficient number, since it is larger than the sum of its proper divisors (75160293).

86722155 is a wasteful number, since it uses less digits than its factorization.

86722155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148267 (or 148264 counting only the distinct ones).

The product of its digits is 33600, while the sum is 36.

The square root of 86722155 is about 9312.4730872094. The cubic root of 86722155 is about 442.6325562845.

The spelling of 86722155 in words is "eighty-six million, seven hundred twenty-two thousand, one hundred fifty-five".