248525991 has 18 divisors (see below), whose sum is σ = 417592032. Its totient is φ = 142014600.

The previous prime is 248525951. The next prime is 248525993. The reversal of 248525991 is 199525842.

It is a happy number.

248525991 is a `hidden beast` number, since 2 + 4 + 8 + 52 + 599 + 1 = 666.

248525991 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 248525991 - 2¹⁷ = 248394919 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (248525993) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 281335 + ... + 282216.

Almost surely, 2^248525991 is an apocalyptic number.

248525991 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

248525991 is a deficient number, since it is larger than the sum of its proper divisors (169066041).

248525991 is a wasteful number, since it uses less digits than its factorization.

248525991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 563571 (or 563561 counting only the distinct ones).

The product of its digits is 259200, while the sum is 45.

The square root of 248525991 is about 15764.7071333406. The cubic root of 248525991 is about 628.7199936933.

The spelling of 248525991 in words is "two hundred forty-eight million, five hundred twenty-five thousand, nine hundred ninety-one".