251641016 has 32 divisors (see below), whose sum is σ = 541814400. Its totient is φ = 108361440.

The previous prime is 251641009. The next prime is 251641037. The reversal of 251641016 is 610146152.

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, 73580 + ... + 76923.

It is an arithmetic number, because the mean of its divisors is an integer number (16931700).

Almost surely, 2^251641016 is an apocalyptic number.

It is an amenable number.

251641016 is an abundant number, since it is smaller than the sum of its proper divisors (290173384).

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

251641016 is a wasteful number, since it uses less digits than its factorization.

251641016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150539 (or 150535 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 251641016 is about 15863.1969035248. The cubic root of 251641016 is about 631.3358870688.

Adding to 251641016 its reverse (610146152), we get a palindrome (861787168).

The spelling of 251641016 in words is "two hundred fifty-one million, six hundred forty-one thousand, sixteen".