2023415521 has 4 divisors (see below), whose sum is σ = 2093188500. Its totient is φ = 1953642544.

The previous prime is 2023415519. The next prime is 2023415549. The reversal of 2023415521 is 1255143202.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1255143202 = 2 ⋅627571601.

It can be written as a sum of positive squares in 2 ways, for example, as 569061025 + 1454354496 = 23855^2 + 38136^2 .

It is a cyclic number.

It is not a de Polignac number, because 2023415521 - 2¹ = 2023415519 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2023415591) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34886446 + ... + 34886503.

It is an arithmetic number, because the mean of its divisors is an integer number (523297125).

Almost surely, 2^2023415521 is an apocalyptic number.

It is an amenable number.

2023415521 is a deficient number, since it is larger than the sum of its proper divisors (69772979).

2023415521 is an equidigital number, since it uses as much as digits as its factorization.

2023415521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69772978.

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 2023415521 is about 44982.3912325701. The cubic root of 2023415521 is about 1264.8189362101.

Adding to 2023415521 its reverse (1255143202), we get a palindrome (3278558723).

The spelling of 2023415521 in words is "two billion, twenty-three million, four hundred fifteen thousand, five hundred twenty-one".