248115021 has 32 divisors (see below), whose sum is σ = 421244928. Its totient is φ = 126143040.

The previous prime is 248115019. The next prime is 248115029. The reversal of 248115021 is 120511842.

It is not a de Polignac number, because 248115021 - 2¹ = 248115019 is a prime.

It is a super-2 number, since 2×248115021² = 123122127291660882, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 248114982 and 248115000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (248115029) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 570 + ... + 22283.

It is an arithmetic number, because the mean of its divisors is an integer number (13163904).

Almost surely, 2^248115021 is an apocalyptic number.

248115021 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

248115021 is a deficient number, since it is larger than the sum of its proper divisors (173129907).

248115021 is a wasteful number, since it uses less digits than its factorization.

248115021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22921.

The product of its (nonzero) digits is 640, while the sum is 24.

The square root of 248115021 is about 15751.6672450887. The cubic root of 248115021 is about 628.3732457735.

Adding to 248115021 its reverse (120511842), we get a palindrome (368626863).

The spelling of 248115021 in words is "two hundred forty-eight million, one hundred fifteen thousand, twenty-one".