57243031 has 2 divisors, whose sum is σ = 57243032. Its totient is φ = 57243030.

The previous prime is 57243001. The next prime is 57243037. The reversal of 57243031 is 13034275.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-57243031 is a prime.

It is a super-2 number, since 2×57243031² = 6553529196133922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 57242987 and 57243005.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (57243037) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28621515 + 28621516.

It is an arithmetic number, because the mean of its divisors is an integer number (28621516).

Almost surely, 2^57243031 is an apocalyptic number.

57243031 is a deficient number, since it is larger than the sum of its proper divisors (1).

57243031 is an equidigital number, since it uses as much as digits as its factorization.

57243031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2520, while the sum is 25.

The square root of 57243031 is about 7565.9124367124. The cubic root of 57243031 is about 385.3962996370.

The spelling of 57243031 in words is "fifty-seven million, two hundred forty-three thousand, thirty-one".