312203142 has 12 divisors (see below), whose sum is σ = 676440180. Its totient is φ = 104067708.

The previous prime is 312203137. The next prime is 312203159. The reversal of 312203142 is 241302213.

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 17344619 = 312203142 / (3 + 1 + 2 + 2 + 0 + 3 + 1 + 4 + 2).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8672292 + ... + 8672327.

It is an arithmetic number, because the mean of its divisors is an integer number (56370015).

Almost surely, 2^312203142 is an apocalyptic number.

312203142 is an abundant number, since it is smaller than the sum of its proper divisors (364237038).

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

312203142 is a wasteful number, since it uses less digits than its factorization.

312203142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17344627 (or 17344624 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 312203142 is about 17669.2711224883. The cubic root of 312203142 is about 678.3894569824.

Adding to 312203142 its reverse (241302213), we get a palindrome (553505355).

The spelling of 312203142 in words is "three hundred twelve million, two hundred three thousand, one hundred forty-two".