162022781 has 6 divisors (see below), whose sum is σ = 164342046. Its totient is φ = 159735800.

The previous prime is 162022711. The next prime is 162022789. The reversal of 162022781 is 187220261.

162022781 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 161518681 + 504100 = 12709^2 + 710^2 .

It is a de Polignac number, because none of the positive numbers 2^k-162022781 is a prime.

It is a super-2 number, since 2×162022781² = 52502763125947922, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (162022789) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11030 + ... + 21111.

It is an arithmetic number, because the mean of its divisors is an integer number (27390341).

Almost surely, 2^162022781 is an apocalyptic number.

162022781 is the 5693-rd centered decagonal number.

It is an amenable number.

162022781 is a deficient number, since it is larger than the sum of its proper divisors (2319265).

162022781 is an frugal number, since it uses more digits than its factorization.

162022781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32283 (or 32212 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 29.

The square root of 162022781 is about 12728.8169520973. The cubic root of 162022781 is about 545.1617296299.

The spelling of 162022781 in words is "one hundred sixty-two million, twenty-two thousand, seven hundred eighty-one".