4257551161 has 4 divisors (see below), whose sum is σ = 4404363300. Its totient is φ = 4110739024.

The previous prime is 4257551159. The next prime is 4257551167. The reversal of 4257551161 is 1611557524.

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 3187279936 + 1070271225 = 56456^2 + 32715^2 .

It is a cyclic number.

It is not a de Polignac number, because 4257551161 - 2¹ = 4257551159 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 4257551161.

It is not an unprimeable number, because it can be changed into a prime (4257551167) 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, 73406026 + ... + 73406083.

It is an arithmetic number, because the mean of its divisors is an integer number (1101090825).

Almost surely, 2^4257551161 is an apocalyptic number.

It is an amenable number.

4257551161 is a deficient number, since it is larger than the sum of its proper divisors (146812139).

4257551161 is a wasteful number, since it uses less digits than its factorization.

4257551161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146812138.

The product of its digits is 42000, while the sum is 37.

The square root of 4257551161 is about 65249.9131110533. The cubic root of 4257551161 is about 1620.7646597177.

The spelling of 4257551161 in words is "four billion, two hundred fifty-seven million, five hundred fifty-one thousand, one hundred sixty-one".