245525991 has 16 divisors (see below), whose sum is σ = 331768800. Its totient is φ = 161491968.

The previous prime is 245525981. The next prime is 245525993. The reversal of 245525991 is 199525542.

It is a happy number.

It is not a de Polignac number, because 245525991 - 2⁶ = 245525927 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (245525993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 188655 + ... + 189951.

It is an arithmetic number, because the mean of its divisors is an integer number (20735550).

Almost surely, 2^245525991 is an apocalyptic number.

245525991 is a deficient number, since it is larger than the sum of its proper divisors (86242809).

245525991 is a wasteful number, since it uses less digits than its factorization.

245525991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2098.

The product of its digits is 162000, while the sum is 42.

The square root of 245525991 is about 15669.2690001799. The cubic root of 245525991 is about 626.1799499338.

The spelling of 245525991 in words is "two hundred forty-five million, five hundred twenty-five thousand, nine hundred ninety-one".