57215503 has 2 divisors, whose sum is σ = 57215504. Its totient is φ = 57215502.

The previous prime is 57215453. The next prime is 57215527. The reversal of 57215503 is 30551275.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 57215503 - 2²¹ = 55118351 is a prime.

It is a super-2 number, since 2×57215503² = 6547227567086018, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (57215533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28607751 + 28607752.

It is an arithmetic number, because the mean of its divisors is an integer number (28607752).

Almost surely, 2^57215503 is an apocalyptic number.

57215503 is a deficient number, since it is larger than the sum of its proper divisors (1).

57215503 is an equidigital number, since it uses as much as digits as its factorization.

57215503 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5250, while the sum is 28.

The square root of 57215503 is about 7564.0930057741. The cubic root of 57215503 is about 385.3345110941.

Adding to 57215503 its reverse (30551275), we get a palindrome (87766778).

The spelling of 57215503 in words is "fifty-seven million, two hundred fifteen thousand, five hundred three".