138222087 has 16 divisors (see below), whose sum is σ = 201434112. Its totient is φ = 83928960.

The previous prime is 138222083. The next prime is 138222103. The reversal of 138222087 is 780222831.

It is not a de Polignac number, because 138222087 - 2² = 138222083 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138222083) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42133 + ... + 45294.

It is an arithmetic number, because the mean of its divisors is an integer number (12589632).

Almost surely, 2^138222087 is an apocalyptic number.

138222087 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

138222087 is a deficient number, since it is larger than the sum of its proper divisors (63212025).

138222087 is a wasteful number, since it uses less digits than its factorization.

138222087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87478.

The product of its (nonzero) digits is 10752, while the sum is 33.

The square root of 138222087 is about 11756.7889748860. The cubic root of 138222087 is about 517.0419910847.

The spelling of 138222087 in words is "one hundred thirty-eight million, two hundred twenty-two thousand, eighty-seven".