722246531 has 4 divisors (see below), whose sum is σ = 722337000. Its totient is φ = 722156064.

The previous prime is 722246521. The next prime is 722246557. The reversal of 722246531 is 135642227.

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

It is a cyclic number.

It is not a de Polignac number, because 722246531 - 2⁶ = 722246467 is a prime.

It is a super-2 number, since 2×722246531² = 1043280103083067922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (722246521) 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, 31961 + ... + 49658.

It is an arithmetic number, because the mean of its divisors is an integer number (180584250).

Almost surely, 2^722246531 is an apocalyptic number.

722246531 is a deficient number, since it is larger than the sum of its proper divisors (90469).

722246531 is an equidigital number, since it uses as much as digits as its factorization.

722246531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90468.

The product of its digits is 20160, while the sum is 32.

The square root of 722246531 is about 26874.6447604429. The cubic root of 722246531 is about 897.2121680031.

Adding to 722246531 its reverse (135642227), we get a palindrome (857888758).

The spelling of 722246531 in words is "seven hundred twenty-two million, two hundred forty-six thousand, five hundred thirty-one".