213388964 has 12 divisors (see below), whose sum is σ = 395397324. Its totient is φ = 100418304.

The previous prime is 213388951. The next prime is 213388979. The reversal of 213388964 is 469883312.

It can be written as a sum of positive squares in 2 ways, for example, as 105062500 + 108326464 = 10250^2 + 10408^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1568969 + ... + 1569104.

It is an arithmetic number, because the mean of its divisors is an integer number (32949777).

Almost surely, 2^213388964 is an apocalyptic number.

It is an amenable number.

213388964 is a deficient number, since it is larger than the sum of its proper divisors (182008360).

213388964 is a wasteful number, since it uses less digits than its factorization.

213388964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3138094 (or 3138092 counting only the distinct ones).

The product of its digits is 248832, while the sum is 44.

The square root of 213388964 is about 14607.8391283584. The cubic root of 213388964 is about 597.5725665965.

The spelling of 213388964 in words is "two hundred thirteen million, three hundred eighty-eight thousand, nine hundred sixty-four".