312540022 has 4 divisors (see below), whose sum is σ = 468810036. Its totient is φ = 156270010.

The previous prime is 312539977. The next prime is 312540023. The reversal of 312540022 is 220045213.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312540023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78135004 + ... + 78135007.

It is an arithmetic number, because the mean of its divisors is an integer number (117202509).

Almost surely, 2^312540022 is an apocalyptic number.

312540022 is a deficient number, since it is larger than the sum of its proper divisors (156270014).

312540022 is a wasteful number, since it uses less digits than its factorization.

312540022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156270013.

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 312540022 is about 17678.8014865262. The cubic root of 312540022 is about 678.6333726246.

Adding to 312540022 its reverse (220045213), we get a palindrome (532585235).

The spelling of 312540022 in words is "three hundred twelve million, five hundred forty thousand, twenty-two".