32445561 has 16 divisors (see below), whose sum is σ = 44817920. Its totient is φ = 20856960.

The previous prime is 32445551. The next prime is 32445563. The reversal of 32445561 is 16554423.

It is not a de Polignac number, because 32445561 - 2¹⁰ = 32444537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (32445563) 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, 37611 + ... + 38463.

It is an arithmetic number, because the mean of its divisors is an integer number (2801120).

Almost surely, 2^32445561 is an apocalyptic number.

32445561 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

32445561 is a deficient number, since it is larger than the sum of its proper divisors (12372359).

32445561 is a wasteful number, since it uses less digits than its factorization.

32445561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1296.

The product of its digits is 14400, while the sum is 30.

The square root of 32445561 is about 5696.1005082425. The cubic root of 32445561 is about 318.9469322073.

Adding to 32445561 its reverse (16554423), we get a palindrome (48999984).

The spelling of 32445561 in words is "thirty-two million, four hundred forty-five thousand, five hundred sixty-one".