2261515156 has 6 divisors (see below), whose sum is σ = 3957651530. Its totient is φ = 1130757576.

The previous prime is 2261515129. The next prime is 2261515189. The reversal of 2261515156 is 6515151622.

It can be written as a sum of positive squares in only one way, i.e., 2261002500 + 512656 = 47550^2 + 716^2 .

It is a super-2 number, since 2×2261515156² = 10228901601635408672, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 282689391 + ... + 282689398.

Almost surely, 2^2261515156 is an apocalyptic number.

It is an amenable number.

2261515156 is a deficient number, since it is larger than the sum of its proper divisors (1696136374).

2261515156 is a wasteful number, since it uses less digits than its factorization.

2261515156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 565378793 (or 565378791 counting only the distinct ones).

The product of its digits is 18000, while the sum is 34.

The square root of 2261515156 is about 47555.3903989863. The cubic root of 2261515156 is about 1312.6023200171.

Adding to 2261515156 its reverse (6515151622), we get a palindrome (8776666778).

The spelling of 2261515156 in words is "two billion, two hundred sixty-one million, five hundred fifteen thousand, one hundred fifty-six".