213431552 has 18 divisors (see below), whose sum is σ = 426029898. Its totient is φ = 106715648.

The previous prime is 213431551. The next prime is 213431557. The reversal of 213431552 is 255134312.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 194212096 + 19219456 = 13936^2 + 4384^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213431551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 416603 + ... + 417114.

Almost surely, 2^213431552 is an apocalyptic number.

It is an amenable number.

213431552 is a deficient number, since it is larger than the sum of its proper divisors (212598346).

213431552 is an frugal number, since it uses more digits than its factorization.

213431552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 833733 (or 833719 counting only the distinct ones).

The product of its digits is 3600, while the sum is 26.

The square root of 213431552 is about 14609.2967661007. The cubic root of 213431552 is about 597.6123183049.

Adding to 213431552 its reverse (255134312), we get a palindrome (468565864).

The spelling of 213431552 in words is "two hundred thirteen million, four hundred thirty-one thousand, five hundred fifty-two".