320150557 has 2 divisors, whose sum is σ = 320150558. Its totient is φ = 320150556.

The previous prime is 320150539. The next prime is 320150561. The reversal of 320150557 is 755051023.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 239042521 + 81108036 = 15461^2 + 9006^2 .

It is a cyclic number.

It is not a de Polignac number, because 320150557 - 2⁷ = 320150429 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (320150587) 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 as a sum of consecutive naturals, namely, 160075278 + 160075279.

It is an arithmetic number, because the mean of its divisors is an integer number (160075279).

Almost surely, 2^320150557 is an apocalyptic number.

It is an amenable number.

320150557 is a deficient number, since it is larger than the sum of its proper divisors (1).

320150557 is an equidigital number, since it uses as much as digits as its factorization.

320150557 is an odious number, because the sum of its binary digits is odd.

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

The square root of 320150557 is about 17892.7515212166. The cubic root of 320150557 is about 684.0976322054.

The spelling of 320150557 in words is "three hundred twenty million, one hundred fifty thousand, five hundred fifty-seven".