162221690 has 32 divisors (see below), whose sum is σ = 301011984. Its totient is φ = 62899200.

The previous prime is 162221687. The next prime is 162221699. The reversal of 162221690 is 96122261.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 30591961 + 131629729 = 5531^2 + 11473^2 .

It is a super-2 number, since 2×162221690² = 52631753412912200, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (162221699) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 124040 + ... + 125340.

Almost surely, 2^162221690 is an apocalyptic number.

162221690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

162221690 is a deficient number, since it is larger than the sum of its proper divisors (138790294).

162221690 is a wasteful number, since it uses less digits than its factorization.

162221690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1682.

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 162221690 is about 12736.6278896732. The cubic root of 162221690 is about 545.3847296080.

The spelling of 162221690 in words is "one hundred sixty-two million, two hundred twenty-one thousand, six hundred ninety".