131016731 has 4 divisors (see below), whose sum is σ = 131076792. Its totient is φ = 130956672.

The previous prime is 131016727. The next prime is 131016779. The reversal of 131016731 is 137610131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 137610131 = 1439 ⋅95629.

It is a cyclic number.

It is not a de Polignac number, because 131016731 - 2² = 131016727 is a prime.

It is a super-2 number, since 2×131016731² = 34330767603852722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 131016697 and 131016706.

It is not an unprimeable number, because it can be changed into a prime (131016791) 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, 26630 + ... + 31163.

It is an arithmetic number, because the mean of its divisors is an integer number (32769198).

Almost surely, 2^131016731 is an apocalyptic number.

131016731 is a deficient number, since it is larger than the sum of its proper divisors (60061).

131016731 is an equidigital number, since it uses as much as digits as its factorization.

131016731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60060.

The product of its (nonzero) digits is 378, while the sum is 23.

The square root of 131016731 is about 11446.2540160526. The cubic root of 131016731 is about 507.8969284241.

Adding to 131016731 its reverse (137610131), we get a palindrome (268626862).

The spelling of 131016731 in words is "one hundred thirty-one million, sixteen thousand, seven hundred thirty-one".