53217025 has 9 divisors (see below), whose sum is σ = 66034371. Its totient is φ = 42544440.

The previous prime is 53217023. The next prime is 53217091. The reversal of 53217025 is 52071235.

The square root of 53217025 is 7295.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 19158129 + 34058896 = 4377^2 + 5836^2 .

It is not a de Polignac number, because 53217025 - 2¹ = 53217023 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53217023) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 35746 + ... + 37204.

Almost surely, 2^53217025 is an apocalyptic number.

53217025 is the 7295-th square number.

53217025 is the 3648-th centered octagonal number.

It is an amenable number.

53217025 is a deficient number, since it is larger than the sum of its proper divisors (12817346).

53217025 is an frugal number, since it uses more digits than its factorization.

53217025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2928 (or 1464 counting only the distinct ones).

The product of its (nonzero) digits is 2100, while the sum is 25.

The cubic root of 53217025 is about 376.1405865747.

Multiplying 53217025 by its sum of digits (25), we get a square (1330425625 = 36475²).

53217025 divided by its sum of digits (25) gives a square (2128681 = 1459²).

The spelling of 53217025 in words is "fifty-three million, two hundred seventeen thousand, twenty-five".