1551565255 has 8 divisors (see below), whose sum is σ = 1907290224. Its totient is φ = 1210977600.

The previous prime is 1551565241. The next prime is 1551565261. The reversal of 1551565255 is 5525651551.

It is a happy number.

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

It is not a de Polignac number, because 1551565255 - 2¹¹ = 1551563207 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3784101 + ... + 3784510.

It is an arithmetic number, because the mean of its divisors is an integer number (238411278).

Almost surely, 2^1551565255 is an apocalyptic number.

1551565255 is a deficient number, since it is larger than the sum of its proper divisors (355724969).

1551565255 is an equidigital number, since it uses as much as digits as its factorization.

1551565255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7568657.

The product of its digits is 187500, while the sum is 40.

The square root of 1551565255 is about 39389.9131123693. The cubic root of 1551565255 is about 1157.6839577197.

The spelling of 1551565255 in words is "one billion, five hundred fifty-one million, five hundred sixty-five thousand, two hundred fifty-five".