2505262981 has 4 divisors (see below), whose sum is σ = 2697975532. Its totient is φ = 2312550432.

The previous prime is 2505262961. The next prime is 2505262999. The reversal of 2505262981 is 1892625052.

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 1359101956 + 1146161025 = 36866^2 + 33855^2 .

It is a cyclic number.

It is not a de Polignac number, because 2505262981 - 2²⁵ = 2471708549 is a prime.

It is a super-2 number, since 2×2505262981² = 12552685207938012722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2505262901) 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, 96356256 + ... + 96356281.

It is an arithmetic number, because the mean of its divisors is an integer number (674493883).

Almost surely, 2^2505262981 is an apocalyptic number.

It is an amenable number.

2505262981 is a deficient number, since it is larger than the sum of its proper divisors (192712551).

2505262981 is a wasteful number, since it uses less digits than its factorization.

2505262981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192712550.

The product of its (nonzero) digits is 86400, while the sum is 40.

The square root of 2505262981 is about 50052.6021401485. The cubic root of 2505262981 is about 1358.1605359758.

The spelling of 2505262981 in words is "two billion, five hundred five million, two hundred sixty-two thousand, nine hundred eighty-one".