731721052 has 12 divisors (see below), whose sum is σ = 1293713680. Its totient is φ = 362088576.

The previous prime is 731721043. The next prime is 731721061. The reversal of 731721052 is 250127137.

It is an interprime number because it is at equal distance from previous prime (731721043) and next prime (731721061).

It is a self number, because there is not a number n which added to its sum of digits gives 731721052.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 942552 + ... + 943327.

Almost surely, 2^731721052 is an apocalyptic number.

It is an amenable number.

731721052 is a deficient number, since it is larger than the sum of its proper divisors (561992628).

731721052 is a wasteful number, since it uses less digits than its factorization.

731721052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1885980 (or 1885978 counting only the distinct ones).

The product of its (nonzero) digits is 2940, while the sum is 28.

The square root of 731721052 is about 27050.3429183439. The cubic root of 731721052 is about 901.1183841509.

Adding to 731721052 its reverse (250127137), we get a palindrome (981848189).

The spelling of 731721052 in words is "seven hundred thirty-one million, seven hundred twenty-one thousand, fifty-two".