208451534 has 4 divisors (see below), whose sum is σ = 312677304. Its totient is φ = 104225766.

The previous prime is 208451531. The next prime is 208451549. The reversal of 208451534 is 435154802.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 208451534.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (208451531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52112882 + ... + 52112885.

It is an arithmetic number, because the mean of its divisors is an integer number (78169326).

Almost surely, 2^208451534 is an apocalyptic number.

208451534 is a deficient number, since it is larger than the sum of its proper divisors (104225770).

208451534 is a wasteful number, since it uses less digits than its factorization.

208451534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104225769.

The product of its (nonzero) digits is 19200, while the sum is 32.

The square root of 208451534 is about 14437.8507403284. The cubic root of 208451534 is about 592.9276434612.

The spelling of 208451534 in words is "two hundred eight million, four hundred fifty-one thousand, five hundred thirty-four".