31474561 has 4 divisors (see below), whose sum is σ = 31577392. Its totient is φ = 31371732.

The previous prime is 31474559. The next prime is 31474571. The reversal of 31474561 is 16547413.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 31474561 - 2¹ = 31474559 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31474501) 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, 50955 + ... + 51568.

It is an arithmetic number, because the mean of its divisors is an integer number (7894348).

Almost surely, 2^31474561 is an apocalyptic number.

It is an amenable number.

31474561 is a deficient number, since it is larger than the sum of its proper divisors (102831).

31474561 is a wasteful number, since it uses less digits than its factorization.

31474561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102830.

The product of its digits is 10080, while the sum is 31.

The square root of 31474561 is about 5610.2193361757. The cubic root of 31474561 is about 315.7329401230.

The spelling of 31474561 in words is "thirty-one million, four hundred seventy-four thousand, five hundred sixty-one".