245721772 has 6 divisors (see below), whose sum is σ = 430013108. Its totient is φ = 122860884.

The previous prime is 245721767. The next prime is 245721787. The reversal of 245721772 is 277127542.

245721772 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30715218 + ... + 30715225.

Almost surely, 2^245721772 is an apocalyptic number.

It is an amenable number.

245721772 is a deficient number, since it is larger than the sum of its proper divisors (184291336).

245721772 is a wasteful number, since it uses less digits than its factorization.

245721772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61430447 (or 61430445 counting only the distinct ones).

The product of its digits is 54880, while the sum is 37.

The square root of 245721772 is about 15675.5150473597. The cubic root of 245721772 is about 626.3463431338.

The spelling of 245721772 in words is "two hundred forty-five million, seven hundred twenty-one thousand, seven hundred seventy-two".