219139136 has 14 divisors (see below), whose sum is σ = 434854350. Its totient is φ = 109569536.

The previous prime is 219139133. The next prime is 219139169. The reversal of 219139136 is 631931912.

It can be written as a sum of positive squares in only one way, i.e., 172134400 + 47004736 = 13120^2 + 6856^2 .

It is a junction number, because it is equal to n+sod(n) for n = 219139096 and 219139105.

It is not an unprimeable number, because it can be changed into a prime (219139133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1711961 + ... + 1712088.

It is an arithmetic number, because the mean of its divisors is an integer number (31061025).

Almost surely, 2^219139136 is an apocalyptic number.

It is an amenable number.

219139136 is a deficient number, since it is larger than the sum of its proper divisors (215715214).

219139136 is an equidigital number, since it uses as much as digits as its factorization.

219139136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3424061 (or 3424051 counting only the distinct ones).

The product of its digits is 8748, while the sum is 35.

The square root of 219139136 is about 14803.3488103199. The cubic root of 219139136 is about 602.8926393921.

The spelling of 219139136 in words is "two hundred nineteen million, one hundred thirty-nine thousand, one hundred thirty-six".