251016 has 16 divisors (see below), whose sum is σ = 627600. Its totient is φ = 83664.

The previous prime is 251003. The next prime is 251033. The reversal of 251016 is 610152.

It is a nialpdrome in base 8.

It is a junction number, because it is equal to n+sod(n) for n = 250986 and 251004.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5206 + ... + 5253.

It is an arithmetic number, because the mean of its divisors is an integer number (39225).

2²⁵¹⁰¹⁶ is an apocalyptic number.

It is an amenable number.

251016 is an abundant number, since it is smaller than the sum of its proper divisors (376584).

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

251016 is a wasteful number, since it uses less digits than its factorization.

251016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10468 (or 10464 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 15.

The square root of 251016 is about 501.0149698362. The cubic root of 251016 is about 63.0812758021.

Subtracting from 251016 its sum of digits (15), we obtain a square (251001 = 501²).

Adding to 251016 its reverse (610152), we get a palindrome (861168).

The spelling of 251016 in words is "two hundred fifty-one thousand, sixteen".