162531557 has 2 divisors, whose sum is σ = 162531558. Its totient is φ = 162531556.

The previous prime is 162531553. The next prime is 162531571. The reversal of 162531557 is 755135261.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 121903681 + 40627876 = 11041^2 + 6374^2 .

It is an emirp because it is prime and its reverse (755135261) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 162531557 - 2² = 162531553 is a prime.

It is a super-3 number, since 3×162531557³ (a number of 26 digits) contains 333 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (162531553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81265778 + 81265779.

It is an arithmetic number, because the mean of its divisors is an integer number (81265779).

Almost surely, 2^162531557 is an apocalyptic number.

It is an amenable number.

162531557 is a deficient number, since it is larger than the sum of its proper divisors (1).

162531557 is an equidigital number, since it uses as much as digits as its factorization.

162531557 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31500, while the sum is 35.

The square root of 162531557 is about 12748.7864912705. The cubic root of 162531557 is about 545.7317634341.

The spelling of 162531557 in words is "one hundred sixty-two million, five hundred thirty-one thousand, five hundred fifty-seven".