1551145505 has 16 divisors (see below), whose sum is σ = 2290923264. Its totient is φ = 981823680.

The previous prime is 1551145471. The next prime is 1551145513. The reversal of 1551145505 is 5055411551.

It is not a de Polignac number, because 1551145505 - 2⁶ = 1551145441 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1704101 + ... + 1705010.

It is an arithmetic number, because the mean of its divisors is an integer number (143182704).

Almost surely, 2^1551145505 is an apocalyptic number.

It is an amenable number.

1551145505 is a deficient number, since it is larger than the sum of its proper divisors (739777759).

1551145505 is a wasteful number, since it uses less digits than its factorization.

1551145505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3409136.

The product of its (nonzero) digits is 12500, while the sum is 32.

The square root of 1551145505 is about 39384.5846112410. The cubic root of 1551145505 is about 1157.5795509672.

It can be divided in two parts, 15511 and 45505, that added together give a palindrome (61016).

The spelling of 1551145505 in words is "one billion, five hundred fifty-one million, one hundred forty-five thousand, five hundred five".