261031324 has 12 divisors (see below), whose sum is σ = 476666064. Its totient is φ = 124841024.

The previous prime is 261031313. The next prime is 261031333. The reversal of 261031324 is 423130162.

It is a junction number, because it is equal to n+sod(n) for n = 261031295 and 261031304.

It is a congruent number.

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, 1418557 + ... + 1418740.

It is an arithmetic number, because the mean of its divisors is an integer number (39722172).

Almost surely, 2^261031324 is an apocalyptic number.

It is an amenable number.

261031324 is a deficient number, since it is larger than the sum of its proper divisors (215634740).

261031324 is a wasteful number, since it uses less digits than its factorization.

261031324 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2837324 (or 2837322 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 261031324 is about 16156.4638457801. The cubic root of 261031324 is about 639.0932177881.

Adding to 261031324 its reverse (423130162), we get a palindrome (684161486).

The spelling of 261031324 in words is "two hundred sixty-one million, thirty-one thousand, three hundred twenty-four".