101564890 has 16 divisors (see below), whose sum is σ = 208933632. Its totient is φ = 34822224.

The previous prime is 101564867. The next prime is 101564923. The reversal of 101564890 is 98465101.

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 7 ways as a sum of consecutive naturals, for example, 725394 + ... + 725533.

It is an arithmetic number, because the mean of its divisors is an integer number (13058352).

Almost surely, 2^101564890 is an apocalyptic number.

101564890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

101564890 is an abundant number, since it is smaller than the sum of its proper divisors (107368742).

101564890 is a wasteful number, since it uses less digits than its factorization.

101564890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1450941.

The product of its (nonzero) digits is 8640, while the sum is 34.

The square root of 101564890 is about 10077.9407618819. The cubic root of 101564890 is about 466.5675543485.

The spelling of 101564890 in words is "one hundred one million, five hundred sixty-four thousand, eight hundred ninety".