2551405551 has 8 divisors (see below), whose sum is σ = 3414521520. Its totient is φ = 1694613312.

The previous prime is 2551405547. The next prime is 2551405573. The reversal of 2551405551 is 1555041552.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2551405551 - 2² = 2551405547 is a prime.

It is a super-2 number, since 2×2551405551² = 13019340571347227202, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2551404551) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1579990 + ... + 1581603.

It is an arithmetic number, because the mean of its divisors is an integer number (426815190).

Almost surely, 2^2551405551 is an apocalyptic number.

2551405551 is a deficient number, since it is larger than the sum of its proper divisors (863115969).

2551405551 is a wasteful number, since it uses less digits than its factorization.

2551405551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3161865.

The product of its (nonzero) digits is 25000, while the sum is 33.

The square root of 2551405551 is about 50511.4398032762. The cubic root of 2551405551 is about 1366.4481763017.

The spelling of 2551405551 in words is "two billion, five hundred fifty-one million, four hundred five thousand, five hundred fifty-one".