75032561 has 4 divisors (see below), whose sum is σ = 75090432. Its totient is φ = 74974692.

The previous prime is 75032527. The next prime is 75032569. The reversal of 75032561 is 16523057.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 75032561 - 2¹⁴ = 75016177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (75032569) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26945 + ... + 29598.

It is an arithmetic number, because the mean of its divisors is an integer number (18772608).

Almost surely, 2^75032561 is an apocalyptic number.

It is an amenable number.

75032561 is a deficient number, since it is larger than the sum of its proper divisors (57871).

75032561 is a wasteful number, since it uses less digits than its factorization.

75032561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57870.

The product of its (nonzero) digits is 6300, while the sum is 29.

The square root of 75032561 is about 8662.1337440610. The cubic root of 75032561 is about 421.7773527345. Note that the first 3 decimals are identical.

The spelling of 75032561 in words is "seventy-five million, thirty-two thousand, five hundred sixty-one".