1005561053 has 4 divisors (see below), whose sum is σ = 1149212640. Its totient is φ = 861909468.

The previous prime is 1005561047. The next prime is 1005561061. The reversal of 1005561053 is 3501655001.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 3501655001 = 13 ⋅269358077.

It is a de Polignac number, because none of the positive numbers 2^k-1005561053 is a prime.

It is a super-2 number, since 2×1005561053² = 2022306062620937618, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1005561023) 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, 71825783 + ... + 71825796.

It is an arithmetic number, because the mean of its divisors is an integer number (287303160).

Almost surely, 2^1005561053 is an apocalyptic number.

It is an amenable number.

1005561053 is a deficient number, since it is larger than the sum of its proper divisors (143651587).

1005561053 is an equidigital number, since it uses as much as digits as its factorization.

1005561053 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143651586.

The product of its (nonzero) digits is 2250, while the sum is 26.

The square root of 1005561053 is about 31710.5826657285. The cubic root of 1005561053 is about 1001.8502587644.

The spelling of 1005561053 in words is "one billion, five million, five hundred sixty-one thousand, fifty-three".