64272531 has 8 divisors (see below), whose sum is σ = 86053264. Its totient is φ = 42670080.

The previous prime is 64272473. The next prime is 64272539. The reversal of 64272531 is 13527246.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 64272531 - 2¹⁰ = 64271507 is a prime.

It is a super-2 number, since 2×64272531² = 8261916482291922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64272539) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43726 + ... + 45171.

It is an arithmetic number, because the mean of its divisors is an integer number (10756658).

Almost surely, 2^64272531 is an apocalyptic number.

64272531 is a deficient number, since it is larger than the sum of its proper divisors (21780733).

64272531 is a wasteful number, since it uses less digits than its factorization.

64272531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89141.

The product of its digits is 10080, while the sum is 30.

The square root of 64272531 is about 8017.0150929133. The cubic root of 64272531 is about 400.5669689026.

Adding to 64272531 its reverse (13527246), we get a palindrome (77799777).

The spelling of 64272531 in words is "sixty-four million, two hundred seventy-two thousand, five hundred thirty-one".