613226881 has 4 divisors (see below), whose sum is σ = 645502000. Its totient is φ = 580951764.

The previous prime is 613226879. The next prime is 613226909. The reversal of 613226881 is 188622316.

It is a happy number.

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.

It is a cyclic number.

It is not a de Polignac number, because 613226881 - 2¹ = 613226879 is a prime.

It is a super-2 number, since 2×613226881² = 752094415161976322, which contains 22 as substring.

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 613226881.

It is not an unprimeable number, because it can be changed into a prime (613226281) 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, 16137531 + ... + 16137568.

It is an arithmetic number, because the mean of its divisors is an integer number (161375500).

Almost surely, 2^613226881 is an apocalyptic number.

It is an amenable number.

613226881 is a deficient number, since it is larger than the sum of its proper divisors (32275119).

613226881 is a wasteful number, since it uses less digits than its factorization.

613226881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32275118.

The product of its digits is 27648, while the sum is 37.

The square root of 613226881 is about 24763.4182010481. The cubic root of 613226881 is about 849.5854407520.

The spelling of 613226881 in words is "six hundred thirteen million, two hundred twenty-six thousand, eight hundred eighty-one".