101663545 has 4 divisors (see below), whose sum is σ = 121996260. Its totient is φ = 81330832.

The previous prime is 101663533. The next prime is 101663561. The reversal of 101663545 is 545366101.

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

It can be written as a sum of positive squares in 2 ways, for example, as 31573161 + 70090384 = 5619^2 + 8372^2 .

It is a cyclic number.

It is not a de Polignac number, because 101663545 - 2²¹ = 99566393 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10166350 + ... + 10166359.

It is an arithmetic number, because the mean of its divisors is an integer number (30499065).

Almost surely, 2^101663545 is an apocalyptic number.

It is an amenable number.

101663545 is a deficient number, since it is larger than the sum of its proper divisors (20332715).

101663545 is an equidigital number, since it uses as much as digits as its factorization.

101663545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20332714.

The product of its (nonzero) digits is 10800, while the sum is 31.

The square root of 101663545 is about 10082.8341749728. The cubic root of 101663545 is about 466.7185721744.

The spelling of 101663545 in words is "one hundred one million, six hundred sixty-three thousand, five hundred forty-five".