213666430 has 16 divisors (see below), whose sum is σ = 384930000. Its totient is φ = 85393152.

The previous prime is 213666391. The next prime is 213666449. The reversal of 213666430 is 34666312.

It is a junction number, because it is equal to n+sod(n) for n = 213666392 and 213666401.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3937 + ... + 21043.

It is an arithmetic number, because the mean of its divisors is an integer number (24058125).

Almost surely, 2^213666430 is an apocalyptic number.

213666430 is a deficient number, since it is larger than the sum of its proper divisors (171263570).

213666430 is a wasteful number, since it uses less digits than its factorization.

213666430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18363.

The product of its (nonzero) digits is 15552, while the sum is 31.

The square root of 213666430 is about 14617.3332041108. Note that the first 3 decimals coincide. The cubic root of 213666430 is about 597.8314588616.

The spelling of 213666430 in words is "two hundred thirteen million, six hundred sixty-six thousand, four hundred thirty".