31356342 has 16 divisors (see below), whose sum is σ = 69680880. Its totient is φ = 10452096.

The previous prime is 31356341. The next prime is 31356361. The reversal of 31356342 is 24365313.

It is a happy number.

31356342 is a `hidden beast` number, since 313 + 5 + 6 + 342 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31356341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 290283 + ... + 290390.

It is an arithmetic number, because the mean of its divisors is an integer number (4355055).

Almost surely, 2^31356342 is an apocalyptic number.

31356342 is an abundant number, since it is smaller than the sum of its proper divisors (38324538).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31356342 is a wasteful number, since it uses less digits than its factorization.

31356342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 580684 (or 580678 counting only the distinct ones).

The product of its digits is 6480, while the sum is 27.

The square root of 31356342 is about 5599.6733833323. The cubic root of 31356342 is about 315.3371446940.

The spelling of 31356342 in words is "thirty-one million, three hundred fifty-six thousand, three hundred forty-two".