101563995 has 16 divisors (see below), whose sum is σ = 175002912. Its totient is φ = 50000640.

The previous prime is 101563993. The next prime is 101564017. The reversal of 101563995 is 599365101.

It is not a de Polignac number, because 101563995 - 2¹ = 101563993 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (101563993) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 260226 + ... + 260615.

It is an arithmetic number, because the mean of its divisors is an integer number (10937682).

Almost surely, 2^101563995 is an apocalyptic number.

101563995 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

101563995 is a deficient number, since it is larger than the sum of its proper divisors (73438917).

101563995 is a wasteful number, since it uses less digits than its factorization.

101563995 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 520862.

The product of its (nonzero) digits is 36450, while the sum is 39.

The square root of 101563995 is about 10077.8963578715. The cubic root of 101563995 is about 466.5661838644.

The spelling of 101563995 in words is "one hundred one million, five hundred sixty-three thousand, nine hundred ninety-five".