213531039 has 16 divisors (see below), whose sum is σ = 316572000. Its totient is φ = 142250688.

The previous prime is 213531023. The next prime is 213531041. The reversal of 213531039 is 930135312.

It is a happy number.

It is not a de Polignac number, because 213531039 - 2⁴ = 213531023 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213531739) 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 15 ways as a sum of consecutive naturals, for example, 60187 + ... + 63635.

It is an arithmetic number, because the mean of its divisors is an integer number (19785750).

Almost surely, 2^213531039 is an apocalyptic number.

213531039 is a deficient number, since it is larger than the sum of its proper divisors (103040961).

213531039 is a wasteful number, since it uses less digits than its factorization.

213531039 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5751 (or 5745 counting only the distinct ones).

The product of its (nonzero) digits is 2430, while the sum is 27.

The square root of 213531039 is about 14612.7012903159. The cubic root of 213531039 is about 597.7051590317.

The spelling of 213531039 in words is "two hundred thirteen million, five hundred thirty-one thousand, thirty-nine".