41561557 has 4 divisors (see below), whose sum is σ = 42242956. Its totient is φ = 40880160.

The previous prime is 41561539. The next prime is 41561579. The reversal of 41561557 is 75516514.

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 2047761 + 39513796 = 1431^2 + 6286^2 .

It is a cyclic number.

It is not a de Polignac number, because 41561557 - 2¹⁵ = 41528789 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (41561537) 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, 340608 + ... + 340729.

It is an arithmetic number, because the mean of its divisors is an integer number (10560739).

Almost surely, 2^41561557 is an apocalyptic number.

It is an amenable number.

41561557 is a deficient number, since it is larger than the sum of its proper divisors (681399).

41561557 is an equidigital number, since it uses as much as digits as its factorization.

41561557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 681398.

The product of its digits is 21000, while the sum is 34.

The square root of 41561557 is about 6446.8253427559. The cubic root of 41561557 is about 346.3888758124.

The spelling of 41561557 in words is "forty-one million, five hundred sixty-one thousand, five hundred fifty-seven".