138087551 has 16 divisors (see below), whose sum is σ = 162871296. Its totient is φ = 114621696.

The previous prime is 138087533. The next prime is 138087559. The reversal of 138087551 is 155780831.

It is not a de Polignac number, because 138087551 - 2¹⁰ = 138086527 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138087559) 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, 29750 + ... + 34076.

It is an arithmetic number, because the mean of its divisors is an integer number (10179456).

Almost surely, 2^138087551 is an apocalyptic number.

138087551 is a deficient number, since it is larger than the sum of its proper divisors (24783745).

138087551 is an equidigital number, since it uses as much as digits as its factorization.

138087551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4478.

The product of its (nonzero) digits is 33600, while the sum is 38.

The square root of 138087551 is about 11751.0659516488. The cubic root of 138087551 is about 516.8741854332.

The spelling of 138087551 in words is "one hundred thirty-eight million, eighty-seven thousand, five hundred fifty-one".