213669870 has 32 divisors (see below), whose sum is σ = 513948672. Its totient is φ = 56851872.

The previous prime is 213669853. The next prime is 213669899. The reversal of 213669870 is 78966312.

It is a happy number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6199 + ... + 21581.

It is an arithmetic number, because the mean of its divisors is an integer number (16060896).

Almost surely, 2^213669870 is an apocalyptic number.

213669870 is an abundant number, since it is smaller than the sum of its proper divisors (300278802).

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

213669870 is a wasteful number, since it uses less digits than its factorization.

213669870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15856.

The product of its (nonzero) digits is 108864, while the sum is 42.

The square root of 213669870 is about 14617.4508721596. The cubic root of 213669870 is about 597.8346671790.

The spelling of 213669870 in words is "two hundred thirteen million, six hundred sixty-nine thousand, eight hundred seventy".