251601252206 has 16 divisors (see below), whose sum is σ = 389800065408. Its totient is φ = 121672562400.

The previous prime is 251601252181. The next prime is 251601252223. The reversal of 251601252206 is 602252106152.

251601252206 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-3 number, since 3×251601252206³ (a number of 35 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1057505 + ... + 1273388.

It is an arithmetic number, because the mean of its divisors is an integer number (24362504088).

Almost surely, 2^251601252206 is an apocalyptic number.

251601252206 is a deficient number, since it is larger than the sum of its proper divisors (138198813202).

251601252206 is a wasteful number, since it uses less digits than its factorization.

251601252206 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2332667.

The product of its (nonzero) digits is 14400, while the sum is 32.

Adding to 251601252206 its reverse (602252106152), we get a palindrome (853853358358).

The spelling of 251601252206 in words is "two hundred fifty-one billion, six hundred one million, two hundred fifty-two thousand, two hundred six".