1551105056 has 24 divisors (see below), whose sum is σ = 3058710480. Its totient is φ = 774289728.

The previous prime is 1551105053. The next prime is 1551105077. The reversal of 1551105056 is 6505011551.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1551105053) 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, 19346 + ... + 58961.

It is an arithmetic number, because the mean of its divisors is an integer number (127446270).

Almost surely, 2^1551105056 is an apocalyptic number.

1551105056 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1551105056 is a deficient number, since it is larger than the sum of its proper divisors (1507605424).

1551105056 is an equidigital number, since it uses as much as digits as its factorization.

1551105056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78936 (or 78928 counting only the distinct ones).

The product of its (nonzero) digits is 3750, while the sum is 29.

The square root of 1551105056 is about 39384.0710947967. The cubic root of 1551105056 is about 1157.5694888675.

The spelling of 1551105056 in words is "one billion, five hundred fifty-one million, one hundred five thousand, fifty-six".