722712531 has 4 divisors (see below), whose sum is σ = 963616712. Its totient is φ = 481808352.

The previous prime is 722712511. The next prime is 722712563. The reversal of 722712531 is 135217227.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 722712531 - 2⁵ = 722712499 is a prime.

It is a super-2 number, since 2×722712531² = 1044626804928851922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (722712511) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 120452086 + ... + 120452091.

It is an arithmetic number, because the mean of its divisors is an integer number (240904178).

Almost surely, 2^722712531 is an apocalyptic number.

722712531 is a deficient number, since it is larger than the sum of its proper divisors (240904181).

722712531 is a wasteful number, since it uses less digits than its factorization.

722712531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240904180.

The product of its digits is 5880, while the sum is 30.

The square root of 722712531 is about 26883.3132444645. The cubic root of 722712531 is about 897.4050896551.

Adding to 722712531 its reverse (135217227), we get a palindrome (857929758).

The spelling of 722712531 in words is "seven hundred twenty-two million, seven hundred twelve thousand, five hundred thirty-one".