64752531 has 4 divisors (see below), whose sum is σ = 86336712. Its totient is φ = 43168352.

The previous prime is 64752491. The next prime is 64752581. The reversal of 64752531 is 13525746.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 64752531 - 2⁷ = 64752403 is a prime.

It is a super-2 number, since 2×64752531² = 8385780541811922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 64752492 and 64752501.

It is not an unprimeable number, because it can be changed into a prime (64752581) 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, 10792086 + ... + 10792091.

It is an arithmetic number, because the mean of its divisors is an integer number (21584178).

Almost surely, 2^64752531 is an apocalyptic number.

64752531 is a deficient number, since it is larger than the sum of its proper divisors (21584181).

64752531 is a wasteful number, since it uses less digits than its factorization.

64752531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21584180.

The product of its digits is 25200, while the sum is 33.

The square root of 64752531 is about 8046.8957368665. The cubic root of 64752531 is about 401.5616679650.

The spelling of 64752531 in words is "sixty-four million, seven hundred fifty-two thousand, five hundred thirty-one".