261031412 has 6 divisors (see below), whose sum is σ = 456804978. Its totient is φ = 130515704.

The previous prime is 261031403. The next prime is 261031417. The reversal of 261031412 is 214130162.

It can be written as a sum of positive squares in only one way, i.e., 259403236 + 1628176 = 16106^2 + 1276^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261031417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32628923 + ... + 32628930.

It is an arithmetic number, because the mean of its divisors is an integer number (76134163).

Almost surely, 2^261031412 is an apocalyptic number.

It is an amenable number.

261031412 is a deficient number, since it is larger than the sum of its proper divisors (195773566).

261031412 is a wasteful number, since it uses less digits than its factorization.

261031412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65257857 (or 65257855 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 261031412 is about 16156.4665691481. The cubic root of 261031412 is about 639.0932896060.

Adding to 261031412 its reverse (214130162), we get a palindrome (475161574).

The spelling of 261031412 in words is "two hundred sixty-one million, thirty-one thousand, four hundred twelve".