2261067521 has 4 divisors (see below), whose sum is σ = 2322177492. Its totient is φ = 2199957552.

The previous prime is 2261067499. The next prime is 2261067533. The reversal of 2261067521 is 1257601622.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1587145921 + 673921600 = 39839^2 + 25960^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2261067521 is a prime.

It is a super-2 number, since 2×2261067521² = 10224852669042170882, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2261067121) 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, 30554930 + ... + 30555003.

It is an arithmetic number, because the mean of its divisors is an integer number (580544373).

Almost surely, 2^2261067521 is an apocalyptic number.

It is an amenable number.

2261067521 is a deficient number, since it is larger than the sum of its proper divisors (61109971).

2261067521 is an equidigital number, since it uses as much as digits as its factorization.

2261067521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61109970.

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 2261067521 is about 47550.6837069668. The cubic root of 2261067521 is about 1312.5157106026.

The spelling of 2261067521 in words is "two billion, two hundred sixty-one million, sixty-seven thousand, five hundred twenty-one".