162213778 has 8 divisors (see below), whose sum is σ = 243947340. Its totient is φ = 80898000.

The previous prime is 162213769. The next prime is 162213839. The reversal of 162213778 is 877312261.

It can be written as a sum of positive squares in 2 ways, for example, as 155675529 + 6538249 = 12477^2 + 2557^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 103473 + ... + 105028.

Almost surely, 2^162213778 is an apocalyptic number.

162213778 is a deficient number, since it is larger than the sum of its proper divisors (81733562).

162213778 is a wasteful number, since it uses less digits than its factorization.

162213778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 208892.

The product of its digits is 28224, while the sum is 37.

The square root of 162213778 is about 12736.3172856207. The cubic root of 162213778 is about 545.3758628239.

It can be divided in two parts, 1622 and 13778, that added together give a triangular number (15400 = T₁₇₅).

The spelling of 162213778 in words is "one hundred sixty-two million, two hundred thirteen thousand, seven hundred seventy-eight".