208142427 has 16 divisors (see below), whose sum is σ = 286406912. Its totient is φ = 134356320.

The previous prime is 208142423. The next prime is 208142443. The reversal of 208142427 is 724241802.

It is not a de Polignac number, because 208142427 - 2² = 208142423 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 208142394 and 208142403.

It is not an unprimeable number, because it can be changed into a prime (208142423) 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, 18978 + ... + 27864.

It is an arithmetic number, because the mean of its divisors is an integer number (17900432).

Almost surely, 2^208142427 is an apocalyptic number.

208142427 is a deficient number, since it is larger than the sum of its proper divisors (78264485).

208142427 is a wasteful number, since it uses less digits than its factorization.

208142427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9138.

The product of its (nonzero) digits is 7168, while the sum is 30.

The square root of 208142427 is about 14427.1420246700. The cubic root of 208142427 is about 592.6344198216.

The spelling of 208142427 in words is "two hundred eight million, one hundred forty-two thousand, four hundred twenty-seven".