1051055557 has 4 divisors (see below), whose sum is σ = 1062865260. Its totient is φ = 1039245856.

The previous prime is 1051055539. The next prime is 1051055563. The reversal of 1051055557 is 7555501501.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7555501501 = 1721 ⋅4390181.

It can be written as a sum of positive squares in 2 ways, for example, as 84529636 + 966525921 = 9194^2 + 31089^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1051055557 is a prime.

It is a super-2 number, since 2×1051055557² = 2209435567801160498, 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 (1051055857) 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, 5904718 + ... + 5904895.

It is an arithmetic number, because the mean of its divisors is an integer number (265716315).

Almost surely, 2^1051055557 is an apocalyptic number.

It is an amenable number.

1051055557 is a deficient number, since it is larger than the sum of its proper divisors (11809703).

1051055557 is an equidigital number, since it uses as much as digits as its factorization.

1051055557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11809702.

The product of its (nonzero) digits is 21875, while the sum is 34.

The square root of 1051055557 is about 32419.9869987636. The cubic root of 1051055557 is about 1016.7368345849.

The spelling of 1051055557 in words is "one billion, fifty-one million, fifty-five thousand, five hundred fifty-seven".