75506531 has 4 divisors (see below), whose sum is σ = 75536712. Its totient is φ = 75476352.

The previous prime is 75506527. The next prime is 75506569. The reversal of 75506531 is 13560557.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13560557 = 907 ⋅14951.

It is a cyclic number.

It is not a de Polignac number, because 75506531 - 2² = 75506527 is a prime.

It is a super-2 number, since 2×75506531² = 11402472447307922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (75506131) 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, 10961 + ... + 16466.

It is an arithmetic number, because the mean of its divisors is an integer number (18884178).

Almost surely, 2^75506531 is an apocalyptic number.

75506531 is a deficient number, since it is larger than the sum of its proper divisors (30181).

75506531 is a wasteful number, since it uses less digits than its factorization.

75506531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30180.

The product of its (nonzero) digits is 15750, while the sum is 32.

The square root of 75506531 is about 8689.4494071834. The cubic root of 75506531 is about 422.6635917500.

The spelling of 75506531 in words is "seventy-five million, five hundred six thousand, five hundred thirty-one".