208142154 has 48 divisors (see below), whose sum is σ = 492972480. Its totient is φ = 62945280.

The previous prime is 208142119. The next prime is 208142159. The reversal of 208142154 is 451241802.

It is a nialpdrome in base 11.

It is not an unprimeable number, because it can be changed into a prime (208142159) 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, 151579 + ... + 152945.

It is an arithmetic number, because the mean of its divisors is an integer number (10270260).

Almost surely, 2^208142154 is an apocalyptic number.

208142154 is an abundant number, since it is smaller than the sum of its proper divisors (284830326).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

208142154 is a wasteful number, since it uses less digits than its factorization.

208142154 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2155 (or 2152 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 27.

The square root of 208142154 is about 14427.1325633336. The cubic root of 208142154 is about 592.6341607213.

Adding to 208142154 its reverse (451241802), we get a palindrome (659383956).

The spelling of 208142154 in words is "two hundred eight million, one hundred forty-two thousand, one hundred fifty-four".