32561451 has 48 divisors (see below), whose sum is σ = 53071200. Its totient is φ = 19109376.

The previous prime is 32561447. The next prime is 32561453. The reversal of 32561451 is 15416523.

It is not a de Polignac number, because 32561451 - 2² = 32561447 is a prime.

It is not an unprimeable number, because it can be changed into a prime (32561453) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 365815 + ... + 365903.

It is an arithmetic number, because the mean of its divisors is an integer number (1105650).

Almost surely, 2^32561451 is an apocalyptic number.

32561451 is a deficient number, since it is larger than the sum of its proper divisors (20509749).

32561451 is a wasteful number, since it uses less digits than its factorization.

32561451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220 (or 217 counting only the distinct ones).

The product of its digits is 3600, while the sum is 27.

The square root of 32561451 is about 5706.2641894676. The cubic root of 32561451 is about 319.3262222934.

Adding to 32561451 its reverse (15416523), we get a palindrome (47977974).

It can be divided in two parts, 325 and 61451, that added together give a triangular number (61776 = T₃₅₁).

The spelling of 32561451 in words is "thirty-two million, five hundred sixty-one thousand, four hundred fifty-one".