162216425 has 24 divisors (see below), whose sum is σ = 235240896. Its totient is φ = 108642240.

The previous prime is 162216421. The next prime is 162216443. The reversal of 162216425 is 524612261.

It is not a de Polignac number, because 162216425 - 2² = 162216421 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (162216421) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3254 + ... + 18303.

It is an arithmetic number, because the mean of its divisors is an integer number (9801704).

Almost surely, 2^162216425 is an apocalyptic number.

It is an amenable number.

162216425 is a deficient number, since it is larger than the sum of its proper divisors (73024471).

162216425 is a wasteful number, since it uses less digits than its factorization.

162216425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21617 (or 21612 counting only the distinct ones).

The product of its digits is 5760, while the sum is 29.

The square root of 162216425 is about 12736.4212006356. The cubic root of 162216425 is about 545.3788292839.

Adding to 162216425 its reverse (524612261), we get a palindrome (686828686).

It can be divided in two parts, 1622 and 16425, that multiplied together give a triangular number (26641350 = T₇₂₉₉).

The spelling of 162216425 in words is "one hundred sixty-two million, two hundred sixteen thousand, four hundred twenty-five".