218039130 has 24 divisors (see below), whose sum is σ = 566901972. Its totient is φ = 58143744.

The previous prime is 218039119. The next prime is 218039141. The reversal of 218039130 is 31930812.

It is an interprime number because it is at equal distance from previous prime (218039119) and next prime (218039141).

It can be written as a sum of positive squares in 2 ways, for example, as 199402641 + 18636489 = 14121^2 + 4317^2 .

It is a super-2 number, since 2×218039130² = 95082124422313800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 218039094 and 218039103.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1211239 + ... + 1211418.

Almost surely, 2^218039130 is an apocalyptic number.

218039130 is an abundant number, since it is smaller than the sum of its proper divisors (348862842).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

218039130 is a wasteful number, since it uses less digits than its factorization.

218039130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2422670 (or 2422667 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 218039130 is about 14766.1481097814. The cubic root of 218039130 is about 601.8821728683.

Adding to 218039130 its reverse (31930812), we get a palindrome (249969942).

The spelling of 218039130 in words is "two hundred eighteen million, thirty-nine thousand, one hundred thirty".