53131345 has 8 divisors (see below), whose sum is σ = 63859176. Its totient is φ = 42437376.

The previous prime is 53131327. The next prime is 53131349. The reversal of 53131345 is 54313135.

It can be written as a sum of positive squares in 4 ways, for example, as 11296321 + 41835024 = 3361^2 + 6468^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 53131345 - 2¹³ = 53123153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53131349) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4872 + ... + 11401.

It is an arithmetic number, because the mean of its divisors is an integer number (7982397).

Almost surely, 2^53131345 is an apocalyptic number.

It is an amenable number.

53131345 is a deficient number, since it is larger than the sum of its proper divisors (10727831).

53131345 is a wasteful number, since it uses less digits than its factorization.

53131345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16931.

The product of its digits is 2700, while the sum is 25.

The square root of 53131345 is about 7289.1251189700. The cubic root of 53131345 is about 375.9386146393.

The spelling of 53131345 in words is "fifty-three million, one hundred thirty-one thousand, three hundred forty-five".