31451416261 has 4 divisors (see below), whose sum is σ = 31762816524. Its totient is φ = 31140016000.

The previous prime is 31451416237. The next prime is 31451416279. The reversal of 31451416261 is 16261415413.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 16261415413 = 101 ⋅161004113.

It can be written as a sum of positive squares in 2 ways, for example, as 25731368100 + 5720048161 = 160410^2 + 75631^2 .

It is a cyclic number.

It is not a de Polignac number, because 31451416261 - 2⁷ = 31451416133 is a prime.

It is a super-3 number, since 3×31451416261³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31451416231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 155699980 + ... + 155700181.

It is an arithmetic number, because the mean of its divisors is an integer number (7940704131).

Almost surely, 2^31451416261 is an apocalyptic number.

It is an amenable number.

31451416261 is a deficient number, since it is larger than the sum of its proper divisors (311400263).

31451416261 is a wasteful number, since it uses less digits than its factorization.

31451416261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 311400262.

The product of its digits is 17280, while the sum is 34.

The spelling of 31451416261 in words is "thirty-one billion, four hundred fifty-one million, four hundred sixteen thousand, two hundred sixty-one".