261214228 has 48 divisors (see below), whose sum is σ = 514882368. Its totient is φ = 114912000.

The previous prime is 261214193. The next prime is 261214229. The reversal of 261214228 is 822412162.

It is a junction number, because it is equal to n+sod(n) for n = 261214196 and 261214205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261214229) 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, 457183 + ... + 457753.

It is an arithmetic number, because the mean of its divisors is an integer number (10726716).

Almost surely, 2^261214228 is an apocalyptic number.

It is an amenable number.

261214228 is a deficient number, since it is larger than the sum of its proper divisors (253668140).

261214228 is a wasteful number, since it uses less digits than its factorization.

261214228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 904 (or 902 counting only the distinct ones).

The product of its digits is 3072, while the sum is 28.

The square root of 261214228 is about 16162.1232516028. The cubic root of 261214228 is about 639.2424532803.

The spelling of 261214228 in words is "two hundred sixty-one million, two hundred fourteen thousand, two hundred twenty-eight".