201497731 has 2 divisors, whose sum is σ = 201497732. Its totient is φ = 201497730.

The previous prime is 201497683. The next prime is 201497749. The reversal of 201497731 is 137794102.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 201497731 - 2²³ = 193109123 is a prime.

It is a super-2 number, since 2×201497731² = 81202671196296722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (201497431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100748865 + 100748866.

It is an arithmetic number, because the mean of its divisors is an integer number (100748866).

Almost surely, 2^201497731 is an apocalyptic number.

201497731 is a deficient number, since it is larger than the sum of its proper divisors (1).

201497731 is an equidigital number, since it uses as much as digits as its factorization.

201497731 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10584, while the sum is 34.

The square root of 201497731 is about 14194.9896442372. The cubic root of 201497731 is about 586.2597160917.

The spelling of 201497731 in words is "two hundred one million, four hundred ninety-seven thousand, seven hundred thirty-one".