255214509 has 16 divisors (see below), whose sum is σ = 387362304. Its totient is φ = 147950000.

The previous prime is 255214507. The next prime is 255214513. The reversal of 255214509 is 905412552.

It is not a de Polignac number, because 255214509 - 2¹ = 255214507 is a prime.

It is a super-2 number, since 2×255214509² = 130268891208222162, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a self number, because there is not a number n which added to its sum of digits gives 255214509.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255214507) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 167367 + ... + 168884.

It is an arithmetic number, because the mean of its divisors is an integer number (24210144).

Almost surely, 2^255214509 is an apocalyptic number.

It is an amenable number.

255214509 is a deficient number, since it is larger than the sum of its proper divisors (132147795).

255214509 is a wasteful number, since it uses less digits than its factorization.

255214509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 336288.

The product of its (nonzero) digits is 18000, while the sum is 33.

The square root of 255214509 is about 15975.4345480804. The cubic root of 255214509 is about 634.3103339618.

The spelling of 255214509 in words is "two hundred fifty-five million, two hundred fourteen thousand, five hundred nine".