2161567 has 8 divisors (see below), whose sum is σ = 2342736. Its totient is φ = 1986432.

The previous prime is 2161553. The next prime is 2161571. The reversal of 2161567 is 7651612.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2161567 - 2¹¹ = 2159519 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2161967) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 748 + ... + 2209.

It is an arithmetic number, because the mean of its divisors is an integer number (292842).

2^2161567 is an apocalyptic number.

2161567 is a deficient number, since it is larger than the sum of its proper divisors (181169).

2161567 is a wasteful number, since it uses less digits than its factorization.

2161567 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3017.

The product of its digits is 2520, while the sum is 28.

The square root of 2161567 is about 1470.2268532441. The cubic root of 2161567 is about 129.2973330973.

The spelling of 2161567 in words is "two million, one hundred sixty-one thousand, five hundred sixty-seven".