115220154 has 32 divisors (see below), whose sum is σ = 263733120. Its totient is φ = 32873472.

The previous prime is 115220143. The next prime is 115220167. The reversal of 115220154 is 451022511.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 115220154.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37542 + ... + 40494.

It is an arithmetic number, because the mean of its divisors is an integer number (8241660).

Almost surely, 2^115220154 is an apocalyptic number.

115220154 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

115220154 is an abundant number, since it is smaller than the sum of its proper divisors (148512966).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

115220154 is a wasteful number, since it uses less digits than its factorization.

115220154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3894.

The product of its (nonzero) digits is 400, while the sum is 21.

The square root of 115220154 is about 10734.0651199813. The cubic root of 115220154 is about 486.6045331531.

Adding to 115220154 its reverse (451022511), we get a palindrome (566242665).

The spelling of 115220154 in words is "one hundred fifteen million, two hundred twenty thousand, one hundred fifty-four".