245227661 has 24 divisors (see below), whose sum is σ = 301532544. Its totient is φ = 195268320.

The previous prime is 245227657. The next prime is 245227687. The reversal of 245227661 is 166722542.

It is not a de Polignac number, because 245227661 - 2² = 245227657 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 (245227621) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 133016 + ... + 134846.

It is an arithmetic number, because the mean of its divisors is an integer number (12563856).

Almost surely, 2^245227661 is an apocalyptic number.

It is an amenable number.

245227661 is a deficient number, since it is larger than the sum of its proper divisors (56304883).

245227661 is a wasteful number, since it uses less digits than its factorization.

245227661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1929 (or 1910 counting only the distinct ones).

The product of its digits is 40320, while the sum is 35.

The square root of 245227661 is about 15659.7465177441. The cubic root of 245227661 is about 625.9262307299.

The spelling of 245227661 in words is "two hundred forty-five million, two hundred twenty-seven thousand, six hundred sixty-one".