101561465 has 4 divisors (see below), whose sum is σ = 121873764. Its totient is φ = 81249168.

The previous prime is 101561431. The next prime is 101561477. The reversal of 101561465 is 564165101.

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 39891856 + 61669609 = 6316^2 + 7853^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-101561465 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10156142 + ... + 10156151.

It is an arithmetic number, because the mean of its divisors is an integer number (30468441).

Almost surely, 2^101561465 is an apocalyptic number.

It is an amenable number.

101561465 is a deficient number, since it is larger than the sum of its proper divisors (20312299).

101561465 is an equidigital number, since it uses as much as digits as its factorization.

101561465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20312298.

The product of its (nonzero) digits is 3600, while the sum is 29.

The square root of 101561465 is about 10077.7708348622. The cubic root of 101561465 is about 466.5623097151.

The spelling of 101561465 in words is "one hundred one million, five hundred sixty-one thousand, four hundred sixty-five".