216086139 has 6 divisors (see below), whose sum is σ = 312124436. Its totient is φ = 144057420.

The previous prime is 216086111. The next prime is 216086147. The reversal of 216086139 is 931680612.

It is not a de Polignac number, because 216086139 - 2⁷ = 216086011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (216086159) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12004777 + ... + 12004794.

Almost surely, 2^216086139 is an apocalyptic number.

216086139 is a deficient number, since it is larger than the sum of its proper divisors (96038297).

216086139 is a wasteful number, since it uses less digits than its factorization.

216086139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24009577 (or 24009574 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 216086139 is about 14699.8686728828. The cubic root of 216086139 is about 600.0797477334.

It can be divided in two parts, 2160861 and 39, that added together give a square (2160900 = 1470²).

The spelling of 216086139 in words is "two hundred sixteen million, eighty-six thousand, one hundred thirty-nine".