1055781551 has 8 divisors (see below), whose sum is σ = 1156353408. Its totient is φ = 955975000.

The previous prime is 1055781533. The next prime is 1055781599. The reversal of 1055781551 is 1551875501.

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

It is a cyclic number.

It is not a de Polignac number, because 1055781551 - 2¹⁰ = 1055780527 is a prime.

It is a super-2 number, since 2×1055781551² = 2229349366863931202, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1055781751) 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, 188435 + ... + 193956.

It is an arithmetic number, because the mean of its divisors is an integer number (144544176).

Almost surely, 2^1055781551 is an apocalyptic number.

1055781551 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1055781551 is a deficient number, since it is larger than the sum of its proper divisors (100571857).

1055781551 is a wasteful number, since it uses less digits than its factorization.

1055781551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 382653.

The product of its (nonzero) digits is 35000, while the sum is 38.

The square root of 1055781551 is about 32492.7922930609. The cubic root of 1055781551 is about 1018.2584503771.

The spelling of 1055781551 in words is "one billion, fifty-five million, seven hundred eighty-one thousand, five hundred fifty-one".