138622451 has 8 divisors (see below), whose sum is σ = 151662000. Its totient is φ = 125655840.

The previous prime is 138622417. The next prime is 138622457. The reversal of 138622451 is 154226831.

138622451 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 138622451 - 2¹⁸ = 138360307 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138622457) 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, 14216 + ... + 21893.

It is an arithmetic number, because the mean of its divisors is an integer number (18957750).

Almost surely, 2^138622451 is an apocalyptic number.

138622451 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

138622451 is a deficient number, since it is larger than the sum of its proper divisors (13039549).

138622451 is a wasteful number, since it uses less digits than its factorization.

138622451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36469.

The product of its digits is 11520, while the sum is 32.

The square root of 138622451 is about 11773.8035910236. The cubic root of 138622451 is about 517.5407185554.

The spelling of 138622451 in words is "one hundred thirty-eight million, six hundred twenty-two thousand, four hundred fifty-one".