162651521 has 2 divisors, whose sum is σ = 162651522. Its totient is φ = 162651520.

The previous prime is 162651497. The next prime is 162651547. The reversal of 162651521 is 125156261.

It is a happy number.

162651521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 97219600 + 65431921 = 9860^2 + 8089^2 .

It is a cyclic number.

It is not a de Polignac number, because 162651521 - 2²² = 158457217 is a prime.

It is a super-2 number, since 2×162651521² = 52911034567226882, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (162651221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81325760 + 81325761.

It is an arithmetic number, because the mean of its divisors is an integer number (81325761).

Almost surely, 2^162651521 is an apocalyptic number.

It is an amenable number.

162651521 is a deficient number, since it is larger than the sum of its proper divisors (1).

162651521 is an equidigital number, since it uses as much as digits as its factorization.

162651521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3600, while the sum is 29.

The square root of 162651521 is about 12753.4905418085. The cubic root of 162651521 is about 545.8659980115.

The spelling of 162651521 in words is "one hundred sixty-two million, six hundred fifty-one thousand, five hundred twenty-one".