2234787521 has 4 divisors (see below), whose sum is σ = 2271423444. Its totient is φ = 2198151600.

The previous prime is 2234787497. The next prime is 2234787563. The reversal of 2234787521 is 1257874322.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1257874322 = 2 ⋅628937161.

It can be written as a sum of positive squares in 2 ways, for example, as 137147521 + 2097640000 = 11711^2 + 45800^2 .

It is a cyclic number.

It is not a de Polignac number, because 2234787521 - 2²⁶ = 2167678657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2234789521) 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, 18317870 + ... + 18317991.

It is an arithmetic number, because the mean of its divisors is an integer number (567855861).

Almost surely, 2^2234787521 is an apocalyptic number.

It is an amenable number.

2234787521 is a deficient number, since it is larger than the sum of its proper divisors (36635923).

2234787521 is an equidigital number, since it uses as much as digits as its factorization.

2234787521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36635922.

The product of its digits is 188160, while the sum is 41.

The square root of 2234787521 is about 47273.5393322734. The cubic root of 2234787521 is about 1307.4108331843.

The spelling of 2234787521 in words is "two billion, two hundred thirty-four million, seven hundred eighty-seven thousand, five hundred twenty-one".