245225242521 has 24 divisors (see below), whose sum is σ = 405447878784. Its totient is φ = 139910077440.

The previous prime is 245225242519. The next prime is 245225242529. The reversal of 245225242521 is 125242522542.

245225242521 is a `hidden beast` number, since 2 + 4 + 5 + 225 + 2 + 425 + 2 + 1 = 666.

It is not a de Polignac number, because 245225242521 - 2¹ = 245225242519 is a prime.

It is not an unprimeable number, because it can be changed into a prime (245225242529) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2995861 + ... + 3076626.

It is an arithmetic number, because the mean of its divisors is an integer number (16893661616).

Almost surely, 2^245225242521 is an apocalyptic number.

245225242521 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

245225242521 is a deficient number, since it is larger than the sum of its proper divisors (160222636263).

245225242521 is a wasteful number, since it uses less digits than its factorization.

245225242521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6073141 (or 6073138 counting only the distinct ones).

The product of its digits is 128000, while the sum is 36.

The spelling of 245225242521 in words is "two hundred forty-five billion, two hundred twenty-five million, two hundred forty-two thousand, five hundred twenty-one".