31349961 has 6 divisors (see below), whose sum is σ = 45283290. Its totient is φ = 20899968.

The previous prime is 31349951. The next prime is 31349971. The reversal of 31349961 is 16994313.

It is an interprime number because it is at equal distance from previous prime (31349951) and next prime (31349971).

It can be written as a sum of positive squares in only one way, i.e., 29909961 + 1440000 = 5469^2 + 1200^2 .

It is not a de Polignac number, because 31349961 - 2¹³ = 31341769 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31349911) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1741656 + ... + 1741673.

It is an arithmetic number, because the mean of its divisors is an integer number (7547215).

Almost surely, 2^31349961 is an apocalyptic number.

It is an amenable number.

31349961 is a deficient number, since it is larger than the sum of its proper divisors (13933329).

31349961 is a wasteful number, since it uses less digits than its factorization.

31349961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3483335 (or 3483332 counting only the distinct ones).

The product of its digits is 17496, while the sum is 36.

The square root of 31349961 is about 5599.1035889685. The cubic root of 31349961 is about 315.3157529255.

The spelling of 31349961 in words is "thirty-one million, three hundred forty-nine thousand, nine hundred sixty-one".