213629931 has 12 divisors (see below), whose sum is σ = 311573808. Its totient is φ = 141036624.

The previous prime is 213629929. The next prime is 213629951. The reversal of 213629931 is 139926312.

It is a happy number.

213629931 is a `hidden beast` number, since 21 + 3 + 629 + 9 + 3 + 1 = 666.

It is not a de Polignac number, because 213629931 - 2¹ = 213629929 is a prime.

It is a super-2 number, since 2×213629931² = 91275494838129522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (213629951) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 114300 + ... + 116153.

It is an arithmetic number, because the mean of its divisors is an integer number (25964484).

Almost surely, 2^213629931 is an apocalyptic number.

213629931 is a deficient number, since it is larger than the sum of its proper divisors (97943877).

213629931 is a wasteful number, since it uses less digits than its factorization.

213629931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 230562 (or 230559 counting only the distinct ones).

The product of its digits is 17496, while the sum is 36.

The square root of 213629931 is about 14616.0846672425. The cubic root of 213629931 is about 597.7974159331.

The spelling of 213629931 in words is "two hundred thirteen million, six hundred twenty-nine thousand, nine hundred thirty-one".