213899774 has 16 divisors (see below), whose sum is σ = 350355456. Its totient is φ = 97133400.

The previous prime is 213899767. The next prime is 213899821. The reversal of 213899774 is 477998312.

It is a super-2 number, since 2×213899774² = 91506226634502152, which contains 22 as substring.

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 7 ways as a sum of consecutive naturals, for example, 22019 + ... + 30209.

It is an arithmetic number, because the mean of its divisors is an integer number (21897216).

Almost surely, 2^213899774 is an apocalyptic number.

213899774 is a deficient number, since it is larger than the sum of its proper divisors (136455682).

213899774 is a wasteful number, since it uses less digits than its factorization.

213899774 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9391.

The product of its digits is 762048, while the sum is 50.

The square root of 213899774 is about 14625.3127829801. The cubic root of 213899774 is about 598.0490092308.

The spelling of 213899774 in words is "two hundred thirteen million, eight hundred ninety-nine thousand, seven hundred seventy-four".