528972257 has 4 divisors (see below), whose sum is σ = 577060656. Its totient is φ = 480883860.

The previous prime is 528972253. The next prime is 528972271. The reversal of 528972257 is 752279825.

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 528972257 - 2² = 528972253 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (528972253) 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, 24044183 + ... + 24044204.

It is an arithmetic number, because the mean of its divisors is an integer number (144265164).

Almost surely, 2^528972257 is an apocalyptic number.

It is an amenable number.

528972257 is a deficient number, since it is larger than the sum of its proper divisors (48088399).

528972257 is a wasteful number, since it uses less digits than its factorization.

528972257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48088398.

The product of its digits is 705600, while the sum is 47.

The square root of 528972257 is about 22999.3968833967. The cubic root of 528972257 is about 808.7438014315.

The spelling of 528972257 in words is "five hundred twenty-eight million, nine hundred seventy-two thousand, two hundred fifty-seven".