31405342 has 8 divisors (see below), whose sum is σ = 47205432. Its totient is φ = 15670200.

The previous prime is 31405333. The next prime is 31405343. The reversal of 31405342 is 24350413.

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

It is a super-2 number, since 2×31405342² = 1972591012273928, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31405343) 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, 15009 + ... + 16972.

It is an arithmetic number, because the mean of its divisors is an integer number (5900679).

Almost surely, 2^31405342 is an apocalyptic number.

31405342 is a deficient number, since it is larger than the sum of its proper divisors (15800090).

31405342 is a wasteful number, since it uses less digits than its factorization.

31405342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32474.

The product of its (nonzero) digits is 1440, while the sum is 22.

The square root of 31405342 is about 5604.0469305672. The cubic root of 31405342 is about 315.5013164636.

Adding to 31405342 its reverse (24350413), we get a palindrome (55755755).

The spelling of 31405342 in words is "thirty-one million, four hundred five thousand, three hundred forty-two".