2865251555 has 4 divisors (see below), whose sum is σ = 3438301872. Its totient is φ = 2292201240.

The previous prime is 2865251537. The next prime is 2865251563. The reversal of 2865251555 is 5551525682.

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

It is not a de Polignac number, because 2865251555 - 2⁸ = 2865251299 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 286525151 + ... + 286525160.

It is an arithmetic number, because the mean of its divisors is an integer number (859575468).

Almost surely, 2^2865251555 is an apocalyptic number.

2865251555 is a deficient number, since it is larger than the sum of its proper divisors (573050317).

2865251555 is an equidigital number, since it uses as much as digits as its factorization.

2865251555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 573050316.

The product of its digits is 600000, while the sum is 44.

The square root of 2865251555 is about 53528.0445654425. The cubic root of 2865251555 is about 1420.3245232960.

The spelling of 2865251555 in words is "two billion, eight hundred sixty-five million, two hundred fifty-one thousand, five hundred fifty-five".