76225561 has 4 divisors (see below), whose sum is σ = 76243300. Its totient is φ = 76207824.

The previous prime is 76225537. The next prime is 76225571. The reversal of 76225561 is 16552267.

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 60543961 + 15681600 = 7781^2 + 3960^2 .

It is a cyclic number.

It is not a de Polignac number, because 76225561 - 2¹³ = 76217369 is a prime.

It is a super-2 number, since 2×76225561² = 11620672299529442, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (76225531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2095 + ... + 12523.

It is an arithmetic number, because the mean of its divisors is an integer number (19060825).

Almost surely, 2^76225561 is an apocalyptic number.

It is an amenable number.

76225561 is a deficient number, since it is larger than the sum of its proper divisors (17739).

76225561 is a wasteful number, since it uses less digits than its factorization.

76225561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17738.

The product of its digits is 25200, while the sum is 34.

The square root of 76225561 is about 8730.7251130705. The cubic root of 76225561 is about 424.0009956812. Note that the first 3 decimals are identical.

The spelling of 76225561 in words is "seventy-six million, two hundred twenty-five thousand, five hundred sixty-one".