213674981 has 12 divisors (see below), whose sum is σ = 231809760. Its totient is φ = 196868880.

The previous prime is 213674957. The next prime is 213675001. The reversal of 213674981 is 189476312.

It is not a de Polignac number, because 213674981 - 2⁶ = 213674917 is a prime.

It is a super-2 number, since 2×213674981² = 91313995010700722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213674081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 136280 + ... + 137838.

It is an arithmetic number, because the mean of its divisors is an integer number (19317480).

Almost surely, 2^213674981 is an apocalyptic number.

It is an amenable number.

213674981 is a deficient number, since it is larger than the sum of its proper divisors (18134779).

213674981 is a wasteful number, since it uses less digits than its factorization.

213674981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2396 (or 2383 counting only the distinct ones).

The product of its digits is 72576, while the sum is 41.

The square root of 213674981 is about 14617.6256963982. The cubic root of 213674981 is about 597.8394338917.

The spelling of 213674981 in words is "two hundred thirteen million, six hundred seventy-four thousand, nine hundred eighty-one".