31492243 has 2 divisors, whose sum is σ = 31492244. Its totient is φ = 31492242.

The previous prime is 31492213. The next prime is 31492259. The reversal of 31492243 is 34229413.

It is a strong prime.

It is an emirp because it is prime and its reverse (34229413) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31492243 - 2¹⁷ = 31361171 is a prime.

It is a super-2 number, since 2×31492243² = 1983522738342098, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (31492213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15746121 + 15746122.

It is an arithmetic number, because the mean of its divisors is an integer number (15746122).

Almost surely, 2^31492243 is an apocalyptic number.

31492243 is a deficient number, since it is larger than the sum of its proper divisors (1).

31492243 is an equidigital number, since it uses as much as digits as its factorization.

31492243 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5184, while the sum is 28.

The square root of 31492243 is about 5611.7949891278. The cubic root of 31492243 is about 315.7920539443.

The spelling of 31492243 in words is "thirty-one million, four hundred ninety-two thousand, two hundred forty-three".