1051161565 has 4 divisors (see below), whose sum is σ = 1261393884. Its totient is φ = 840929248.

The previous prime is 1051161541. The next prime is 1051161583. The reversal of 1051161565 is 5651611501.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 443144601 + 608016964 = 21051^2 + 24658^2 .

It is a cyclic number.

It is not a de Polignac number, because 1051161565 - 2¹³ = 1051153373 is a prime.

It is a super-2 number, since 2×1051161565² = 2209881271466498450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 105116152 + ... + 105116161.

It is an arithmetic number, because the mean of its divisors is an integer number (315348471).

Almost surely, 2^1051161565 is an apocalyptic number.

It is an amenable number.

1051161565 is a deficient number, since it is larger than the sum of its proper divisors (210232319).

1051161565 is an equidigital number, since it uses as much as digits as its factorization.

1051161565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210232318.

The product of its (nonzero) digits is 4500, while the sum is 31.

The square root of 1051161565 is about 32421.6218749155. The cubic root of 1051161565 is about 1016.7710156563.

The spelling of 1051161565 in words is "one billion, fifty-one million, one hundred sixty-one thousand, five hundred sixty-five".