31450230261 has 16 divisors (see below), whose sum is σ = 46595668800. Its totient is φ = 20965589424.

The previous prime is 31450230247. The next prime is 31450230281. The reversal of 31450230261 is 16203205413.

It is not a de Polignac number, because 31450230261 - 2²³ = 31441841653 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31450230221) 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, 851010 + ... + 887196.

It is an arithmetic number, because the mean of its divisors is an integer number (2912229300).

Almost surely, 2^31450230261 is an apocalyptic number.

It is an amenable number.

31450230261 is a deficient number, since it is larger than the sum of its proper divisors (15145438539).

31450230261 is a wasteful number, since it uses less digits than its factorization.

31450230261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68385 (or 68379 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

Adding to 31450230261 its reverse (16203205413), we get a palindrome (47653435674).

The spelling of 31450230261 in words is "thirty-one billion, four hundred fifty million, two hundred thirty thousand, two hundred sixty-one".