31492147 has 4 divisors (see below), whose sum is σ = 31798000. Its totient is φ = 31186296.

The previous prime is 31492093. The next prime is 31492157. The reversal of 31492147 is 74129413.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 74129413 = 79 ⋅938347.

It is a cyclic number.

It is not a de Polignac number, because 31492147 - 2¹¹ = 31490099 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31492157) 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, 152772 + ... + 152977.

It is an arithmetic number, because the mean of its divisors is an integer number (7949500).

Almost surely, 2^31492147 is an apocalyptic number.

31492147 is a deficient number, since it is larger than the sum of its proper divisors (305853).

31492147 is a wasteful number, since it uses less digits than its factorization.

31492147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 305852.

The product of its digits is 6048, while the sum is 31.

The square root of 31492147 is about 5611.7864357083. The cubic root of 31492147 is about 315.7917330603.

The spelling of 31492147 in words is "thirty-one million, four hundred ninety-two thousand, one hundred forty-seven".