101655561 has 16 divisors (see below), whose sum is σ = 161639424. Its totient is φ = 55563024.

The previous prime is 101655559. The next prime is 101655577. The reversal of 101655561 is 165556101.

It is not a de Polignac number, because 101655561 - 2¹ = 101655559 is a prime.

It is not an unprimeable number, because it can be changed into a prime (101655061) 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, 104751 + ... + 105716.

It is an arithmetic number, because the mean of its divisors is an integer number (10102464).

Almost surely, 2^101655561 is an apocalyptic number.

It is an amenable number.

101655561 is a deficient number, since it is larger than the sum of its proper divisors (59983863).

101655561 is a wasteful number, since it uses less digits than its factorization.

101655561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210500.

The product of its (nonzero) digits is 4500, while the sum is 30.

The square root of 101655561 is about 10082.4382467734. The cubic root of 101655561 is about 466.7063541644.

The spelling of 101655561 in words is "one hundred one million, six hundred fifty-five thousand, five hundred sixty-one".