245553521 has 8 divisors (see below), whose sum is σ = 256612224. Its totient is φ = 234738000.

The previous prime is 245553481. The next prime is 245553533. The reversal of 245553521 is 125355542.

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

It is a cyclic number.

It is not a de Polignac number, because 245553521 - 2¹⁸ = 245291377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (245553541) 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, 58730 + ... + 62771.

It is an arithmetic number, because the mean of its divisors is an integer number (32076528).

Almost surely, 2^245553521 is an apocalyptic number.

It is an amenable number.

245553521 is a deficient number, since it is larger than the sum of its proper divisors (11058703).

245553521 is a wasteful number, since it uses less digits than its factorization.

245553521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121591.

The product of its digits is 30000, while the sum is 32.

The square root of 245553521 is about 15670.1474466579. The cubic root of 245553521 is about 626.2033528734.

The spelling of 245553521 in words is "two hundred forty-five million, five hundred fifty-three thousand, five hundred twenty-one".