31225641 has 8 divisors (see below), whose sum is σ = 42649824. Its totient is φ = 20309280.

The previous prime is 31225633. The next prime is 31225643. The reversal of 31225641 is 14652213.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 31225641 - 2³ = 31225633 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31225643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 126811 + ... + 127056.

It is an arithmetic number, because the mean of its divisors is an integer number (5331228).

Almost surely, 2^31225641 is an apocalyptic number.

It is an amenable number.

31225641 is a deficient number, since it is larger than the sum of its proper divisors (11424183).

31225641 is a wasteful number, since it uses less digits than its factorization.

31225641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 253911.

The product of its digits is 1440, while the sum is 24.

The square root of 31225641 is about 5587.9907838149. The cubic root of 31225641 is about 314.8984000882.

Adding to 31225641 its reverse (14652213), we get a palindrome (45877854).

The spelling of 31225641 in words is "thirty-one million, two hundred twenty-five thousand, six hundred forty-one".