201315731 has 2 divisors, whose sum is σ = 201315732. Its totient is φ = 201315730.

The previous prime is 201315707. The next prime is 201315739. The reversal of 201315731 is 137513102.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 201315731 - 2²² = 197121427 is a prime.

It is a super-2 number, since 2×201315731² = 81056047096128722, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 201315697 and 201315706.

It is not a weakly prime, because it can be changed into another prime (201315739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100657865 + 100657866.

It is an arithmetic number, because the mean of its divisors is an integer number (100657866).

Almost surely, 2^201315731 is an apocalyptic number.

201315731 is a deficient number, since it is larger than the sum of its proper divisors (1).

201315731 is an equidigital number, since it uses as much as digits as its factorization.

201315731 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 630, while the sum is 23.

The square root of 201315731 is about 14188.5774833138. The cubic root of 201315731 is about 586.0831526323.

Adding to 201315731 its reverse (137513102), we get a palindrome (338828833).

The spelling of 201315731 in words is "two hundred one million, three hundred fifteen thousand, seven hundred thirty-one".