553221025 has 18 divisors (see below), whose sum is σ = 797994870. Its totient is φ = 379350720.

The previous prime is 553220989. The next prime is 553221073. The reversal of 553221025 is 520122355.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 195216784 + 358004241 = 13972^2 + 18921^2 .

It is not a de Polignac number, because 553221025 - 2²¹ = 551123873 is a prime.

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

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 224580 + ... + 227029.

Almost surely, 2^553221025 is an apocalyptic number.

It is an amenable number.

553221025 is a deficient number, since it is larger than the sum of its proper divisors (244773845).

553221025 is a wasteful number, since it uses less digits than its factorization.

553221025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 451633 (or 451621 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 25.

The square root of 553221025 is about 23520.6510326564. The cubic root of 553221025 is about 820.9175852663.

The spelling of 553221025 in words is "five hundred fifty-three million, two hundred twenty-one thousand, twenty-five".