138211465 has 16 divisors (see below), whose sum is σ = 194671872. Its totient is φ = 92211264.

The previous prime is 138211459. The next prime is 138211471. The reversal of 138211465 is 564112831.

It is an interprime number because it is at equal distance from previous prime (138211459) and next prime (138211471).

It is a cyclic number.

It is not a de Polignac number, because 138211465 - 2⁹ = 138210953 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52069 + ... + 54658.

It is an arithmetic number, because the mean of its divisors is an integer number (12166992).

Almost surely, 2^138211465 is an apocalyptic number.

It is an amenable number.

138211465 is a deficient number, since it is larger than the sum of its proper divisors (56460407).

138211465 is a wasteful number, since it uses less digits than its factorization.

138211465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106776.

The product of its digits is 5760, while the sum is 31.

The square root of 138211465 is about 11756.3372272149. The cubic root of 138211465 is about 517.0287463112.

The spelling of 138211465 in words is "one hundred thirty-eight million, two hundred eleven thousand, four hundred sixty-five".