1055506551 has 8 divisors (see below), whose sum is σ = 1535282304. Its totient is φ = 639700920.

The previous prime is 1055506541. The next prime is 1055506559. The reversal of 1055506551 is 1556055501.

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

It is not a de Polignac number, because 1055506551 - 2¹⁷ = 1055375479 is a prime.

It is a super-2 number, since 2×1055506551² = 2228188158407831202, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33), and also a Moran number because the ratio is a prime number: 31985047 = 1055506551 / (1 + 0 + 5 + 5 + 5 + 0 + 6 + 5 + 5 + 1).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1055506559) 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, 15992491 + ... + 15992556.

It is an arithmetic number, because the mean of its divisors is an integer number (191910288).

Almost surely, 2^1055506551 is an apocalyptic number.

1055506551 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1055506551 is a deficient number, since it is larger than the sum of its proper divisors (479775753).

1055506551 is a wasteful number, since it uses less digits than its factorization.

1055506551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31985061.

The product of its (nonzero) digits is 18750, while the sum is 33.

The square root of 1055506551 is about 32488.5603097460. The cubic root of 1055506551 is about 1018.1700339209.

It can be divided in two parts, 105550 and 6551, that added together give a triangular number (112101 = T₄₇₃).

The spelling of 1055506551 in words is "one billion, fifty-five million, five hundred six thousand, five hundred fifty-one".