138283551 has 32 divisors (see below), whose sum is σ = 238118400. Its totient is φ = 77673600.

The previous prime is 138283549. The next prime is 138283573. The reversal of 138283551 is 155382831.

It is not a de Polignac number, because 138283551 - 2¹ = 138283549 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138283531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4951 + ... + 17351.

It is an arithmetic number, because the mean of its divisors is an integer number (7441200).

Almost surely, 2^138283551 is an apocalyptic number.

138283551 is a deficient number, since it is larger than the sum of its proper divisors (99834849).

138283551 is a wasteful number, since it uses less digits than its factorization.

138283551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12476 (or 12470 counting only the distinct ones).

The product of its digits is 28800, while the sum is 36.

The square root of 138283551 is about 11759.4026634009. The cubic root of 138283551 is about 517.1186183934.

The spelling of 138283551 in words is "one hundred thirty-eight million, two hundred eighty-three thousand, five hundred fifty-one".