101131643 has 2 divisors, whose sum is σ = 101131644. Its totient is φ = 101131642.

The previous prime is 101131637. The next prime is 101131669. The reversal of 101131643 is 346131101.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 101131643 - 2⁴ = 101131627 is a prime.

It is not a weakly prime, because it can be changed into another prime (101130643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50565821 + 50565822.

It is an arithmetic number, because the mean of its divisors is an integer number (50565822).

Almost surely, 2^101131643 is an apocalyptic number.

101131643 is a deficient number, since it is larger than the sum of its proper divisors (1).

101131643 is an equidigital number, since it uses as much as digits as its factorization.

101131643 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 101131643 is about 10056.4229724092. The cubic root of 101131643 is about 465.9031938632.

Adding to 101131643 its reverse (346131101), we get a palindrome (447262744).

The spelling of 101131643 in words is "one hundred one million, one hundred thirty-one thousand, six hundred forty-three".