2261253557 has 4 divisors (see below), whose sum is σ = 2322368556. Its totient is φ = 2200138560.

The previous prime is 2261253541. The next prime is 2261253559. The reversal of 2261253557 is 7553521622.

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 1846764676 + 414488881 = 42974^2 + 20359^2 .

It is a cyclic number.

It is not a de Polignac number, because 2261253557 - 2⁴ = 2261253541 is a prime.

It is a super-2 number, since 2×2261253557² = 10226535298090304498, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2261253557.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2261253559) 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, 30557444 + ... + 30557517.

It is an arithmetic number, because the mean of its divisors is an integer number (580592139).

Almost surely, 2^2261253557 is an apocalyptic number.

It is an amenable number.

2261253557 is a deficient number, since it is larger than the sum of its proper divisors (61114999).

2261253557 is an equidigital number, since it uses as much as digits as its factorization.

2261253557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61114998.

The product of its digits is 126000, while the sum is 38.

The square root of 2261253557 is about 47552.6398531144. The cubic root of 2261253557 is about 1312.5517066493.

The spelling of 2261253557 in words is "two billion, two hundred sixty-one million, two hundred fifty-three thousand, five hundred fifty-seven".