253671725 has 12 divisors (see below), whose sum is σ = 315134964. Its totient is φ = 202561920.

The previous prime is 253671721. The next prime is 253671731. The reversal of 253671725 is 527176352.

It can be written as a sum of positive squares in 6 ways, for example, as 64416676 + 189255049 = 8026^2 + 13757^2 .

It is not a de Polignac number, because 253671725 - 2² = 253671721 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 (253671721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4817 + ... + 23033.

It is an arithmetic number, because the mean of its divisors is an integer number (26261247).

Almost surely, 2^253671725 is an apocalyptic number.

253671725 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

253671725 is a deficient number, since it is larger than the sum of its proper divisors (61463239).

253671725 is a wasteful number, since it uses less digits than its factorization.

253671725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18784 (or 18779 counting only the distinct ones).

The product of its digits is 88200, while the sum is 38.

The square root of 253671725 is about 15927.0752180053. The cubic root of 253671725 is about 633.0296042863.

The spelling of 253671725 in words is "two hundred fifty-three million, six hundred seventy-one thousand, seven hundred twenty-five".