1055051561 has 16 divisors (see below), whose sum is σ = 1112724480. Its totient is φ = 998418960.

The previous prime is 1055051521. The next prime is 1055051593. The reversal of 1055051561 is 1651505501.

It is a happy number.

It is not a de Polignac number, because 1055051561 - 2²² = 1050857257 is a prime.

It is a super-2 number, since 2×1055051561² = 2226267592737073442, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1055051521) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1671716 + ... + 1672346.

It is an arithmetic number, because the mean of its divisors is an integer number (69545280).

Almost surely, 2^1055051561 is an apocalyptic number.

It is an amenable number.

1055051561 is a deficient number, since it is larger than the sum of its proper divisors (57672919).

1055051561 is a wasteful number, since it uses less digits than its factorization.

1055051561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1316.

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

The square root of 1055051561 is about 32481.5572440731. The cubic root of 1055051561 is about 1018.0237143604.

The spelling of 1055051561 in words is "one billion, fifty-five million, fifty-one thousand, five hundred sixty-one".