245772731 has 4 divisors (see below), whose sum is σ = 247244592. Its totient is φ = 244300872.

The previous prime is 245772727. The next prime is 245772749. The reversal of 245772731 is 137277542.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 245772731 - 2² = 245772727 is a prime.

It is a super-2 number, since 2×245772731² = 120808470606396722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (245772781) 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, 735680 + ... + 736013.

It is an arithmetic number, because the mean of its divisors is an integer number (61811148).

Almost surely, 2^245772731 is an apocalyptic number.

245772731 is a deficient number, since it is larger than the sum of its proper divisors (1471861).

245772731 is a wasteful number, since it uses less digits than its factorization.

245772731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1471860.

The product of its digits is 82320, while the sum is 38.

The square root of 245772731 is about 15677.1403961309. The cubic root of 245772731 is about 626.3896384115.

The spelling of 245772731 in words is "two hundred forty-five million, seven hundred seventy-two thousand, seven hundred thirty-one".