213231672 has 48 divisors (see below), whose sum is σ = 578181240. Its totient is φ = 70993728.

The previous prime is 213231659. The next prime is 213231677. The reversal of 213231672 is 276132312.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213231677) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 105778 + ... + 107774.

Almost surely, 2^213231672 is an apocalyptic number.

It is an amenable number.

213231672 is an abundant number, since it is smaller than the sum of its proper divisors (364949568).

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

213231672 is a wasteful number, since it uses less digits than its factorization.

213231672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3492 (or 3485 counting only the distinct ones).

The product of its digits is 3024, while the sum is 27.

The square root of 213231672 is about 14602.4543142583. The cubic root of 213231672 is about 597.4257041308.

Adding to 213231672 its reverse (276132312), we get a palindrome (489363984).

The spelling of 213231672 in words is "two hundred thirteen million, two hundred thirty-one thousand, six hundred seventy-two".