245723157 has 6 divisors (see below), whose sum is σ = 354933462. Its totient is φ = 163815432.

The previous prime is 245723129. The next prime is 245723167. The reversal of 245723157 is 751327542.

245723157 is a `hidden beast` number, since 2 + 4 + 572 + 31 + 57 = 666.

It can be written as a sum of positive squares in only one way, i.e., 243079281 + 2643876 = 15591^2 + 1626^2 .

It is not a de Polignac number, because 245723157 - 2⁸ = 245722901 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (245723167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13651278 + ... + 13651295.

It is an arithmetic number, because the mean of its divisors is an integer number (59155577).

Almost surely, 2^245723157 is an apocalyptic number.

It is an amenable number.

245723157 is a deficient number, since it is larger than the sum of its proper divisors (109210305).

245723157 is a wasteful number, since it uses less digits than its factorization.

245723157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27302579 (or 27302576 counting only the distinct ones).

The product of its digits is 58800, while the sum is 36.

The square root of 245723157 is about 15675.5592244743. The cubic root of 245723157 is about 626.3475199228.

The spelling of 245723157 in words is "two hundred forty-five million, seven hundred twenty-three thousand, one hundred fifty-seven".