218450131 has 8 divisors (see below), whose sum is σ = 221397120. Its totient is φ = 215521152.

The previous prime is 218450123. The next prime is 218450137. The reversal of 218450131 is 131054812.

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 218450131 - 2³ = 218450123 is a prime.

It is a super-2 number, since 2×218450131² = 95440919467834322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 218450096 and 218450105.

It is not an unprimeable number, because it can be changed into a prime (218450137) 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, 20865 + ... + 29533.

It is an arithmetic number, because the mean of its divisors is an integer number (27674640).

Almost surely, 2^218450131 is an apocalyptic number.

218450131 is a deficient number, since it is larger than the sum of its proper divisors (2946989).

218450131 is a wasteful number, since it uses less digits than its factorization.

218450131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9005.

The product of its (nonzero) digits is 960, while the sum is 25.

The square root of 218450131 is about 14780.0585587473. The cubic root of 218450131 is about 602.2601155876.

The spelling of 218450131 in words is "two hundred eighteen million, four hundred fifty thousand, one hundred thirty-one".