31200342 has 16 divisors (see below), whose sum is σ = 62662512. Its totient is φ = 10356480.

The previous prime is 31200313. The next prime is 31200343. The reversal of 31200342 is 24300213.

It is a super-2 number, since 2×31200342² = 1946922681833928, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31200343) 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, 9343 + ... + 12234.

It is an arithmetic number, because the mean of its divisors is an integer number (3916407).

Almost surely, 2^31200342 is an apocalyptic number.

31200342 is an abundant number, since it is smaller than the sum of its proper divisors (31462170).

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

31200342 is a wasteful number, since it uses less digits than its factorization.

31200342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21823.

The product of its (nonzero) digits is 144, while the sum is 15.

The square root of 31200342 is about 5585.7266313345. The cubic root of 31200342 is about 314.8133335974.

Adding to 31200342 its reverse (24300213), we get a palindrome (55500555).

The spelling of 31200342 in words is "thirty-one million, two hundred thousand, three hundred forty-two".