31071461 has 4 divisors (see below), whose sum is σ = 32899212. Its totient is φ = 29243712.

The previous prime is 31071457. The next prime is 31071487. The reversal of 31071461 is 16417013.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 16417013 = 43 ⋅381791.

It can be written as a sum of positive squares in 2 ways, for example, as 14822500 + 16248961 = 3850^2 + 4031^2 .

It is a cyclic number.

It is not a de Polignac number, because 31071461 - 2² = 31071457 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31071401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 913850 + ... + 913883.

It is an arithmetic number, because the mean of its divisors is an integer number (8224803).

Almost surely, 2^31071461 is an apocalyptic number.

It is an amenable number.

31071461 is a deficient number, since it is larger than the sum of its proper divisors (1827751).

31071461 is a wasteful number, since it uses less digits than its factorization.

31071461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1827750.

The product of its (nonzero) digits is 504, while the sum is 23.

The square root of 31071461 is about 5574.1780560007. The cubic root of 31071461 is about 314.3792630119.

Adding to 31071461 its reverse (16417013), we get a palindrome (47488474).

The spelling of 31071461 in words is "thirty-one million, seventy-one thousand, four hundred sixty-one".