213946642 has 48 divisors (see below), whose sum is σ = 408770712. Its totient is φ = 83220480.

The previous prime is 213946619. The next prime is 213946657. The reversal of 213946642 is 246649312.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 139452481 + 74494161 = 11809^2 + 8631^2 .

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 76338 + ... + 79090.

Almost surely, 2^213946642 is an apocalyptic number.

213946642 is a deficient number, since it is larger than the sum of its proper divisors (194824070).

213946642 is a wasteful number, since it uses less digits than its factorization.

213946642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2843 (or 2836 counting only the distinct ones).

The product of its digits is 62208, while the sum is 37.

The square root of 213946642 is about 14626.9149857378. The cubic root of 213946642 is about 598.0926859389.

The spelling of 213946642 in words is "two hundred thirteen million, nine hundred forty-six thousand, six hundred forty-two".