216019425 has 24 divisors (see below), whose sum is σ = 378163296. Its totient is φ = 108432640.

The previous prime is 216019423. The next prime is 216019429. The reversal of 216019425 is 524910612.

It is not a de Polignac number, because 216019425 - 2¹ = 216019423 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 216019392 and 216019401.

It is not an unprimeable number, because it can be changed into a prime (216019421) 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, 83439 + ... + 85988.

It is an arithmetic number, because the mean of its divisors is an integer number (15756804).

Almost surely, 2^216019425 is an apocalyptic number.

216019425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

216019425 is a deficient number, since it is larger than the sum of its proper divisors (162143871).

216019425 is a wasteful number, since it uses less digits than its factorization.

216019425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169457 (or 169452 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 216019425 is about 14697.5992937622. The cubic root of 216019425 is about 600.0179855720.

The spelling of 216019425 in words is "two hundred sixteen million, nineteen thousand, four hundred twenty-five".