131000722 has 4 divisors (see below), whose sum is σ = 196501086. Its totient is φ = 65500360.

The previous prime is 131000719. The next prime is 131000767. The reversal of 131000722 is 227000131.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 106110601 + 24890121 = 10301^2 + 4989^2 .

It is a super-2 number, since 2×131000722² = 34322378329042568, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 131000696 and 131000705.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32750179 + ... + 32750182.

Almost surely, 2^131000722 is an apocalyptic number.

131000722 is a deficient number, since it is larger than the sum of its proper divisors (65500364).

131000722 is an equidigital number, since it uses as much as digits as its factorization.

131000722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65500363.

The product of its (nonzero) digits is 84, while the sum is 16.

The square root of 131000722 is about 11445.5546829326. The cubic root of 131000722 is about 507.8762408547.

Adding to 131000722 its reverse (227000131), we get a palindrome (358000853).

The spelling of 131000722 in words is "one hundred thirty-one million, seven hundred twenty-two", and thus it is an aban number.