31421047 has 8 divisors (see below), whose sum is σ = 36785952. Its totient is φ = 26275200.

The previous prime is 31421009. The next prime is 31421053. The reversal of 31421047 is 74012413.

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

It is not a de Polignac number, because 31421047 - 2¹¹ = 31418999 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31421447) 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, 54454 + ... + 55027.

It is an arithmetic number, because the mean of its divisors is an integer number (4598244).

Almost surely, 2^31421047 is an apocalyptic number.

31421047 is a deficient number, since it is larger than the sum of its proper divisors (5364905).

31421047 is a wasteful number, since it uses less digits than its factorization.

31421047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109529.

The product of its (nonzero) digits is 672, while the sum is 22.

The square root of 31421047 is about 5605.4479749615. The cubic root of 31421047 is about 315.5538990514.

The spelling of 31421047 in words is "thirty-one million, four hundred twenty-one thousand, forty-seven".