81202155 has 8 divisors (see below), whose sum is σ = 129923472. Its totient is φ = 43307808.

The previous prime is 81202153. The next prime is 81202159. The reversal of 81202155 is 55120218.

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

It is not a de Polignac number, because 81202155 - 2¹ = 81202153 is a prime.

It is not an unprimeable number, because it can be changed into a prime (81202153) 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, 2706724 + ... + 2706753.

It is an arithmetic number, because the mean of its divisors is an integer number (16240434).

Almost surely, 2^81202155 is an apocalyptic number.

81202155 is a deficient number, since it is larger than the sum of its proper divisors (48721317).

81202155 is a wasteful number, since it uses less digits than its factorization.

81202155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5413485.

The product of its (nonzero) digits is 800, while the sum is 24.

The square root of 81202155 is about 9011.2238347519. The cubic root of 81202155 is about 433.0345201621.

The spelling of 81202155 in words is "eighty-one million, two hundred two thousand, one hundred fifty-five".