312643141 has 4 divisors (see below), whose sum is σ = 331033932. Its totient is φ = 294252352.

The previous prime is 312643099. The next prime is 312643169. The reversal of 312643141 is 141346213.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 141346213 = 1483 ⋅95311.

It can be written as a sum of positive squares in 2 ways, for example, as 247905025 + 64738116 = 15745^2 + 8046^2 .

It is a cyclic number.

It is not a de Polignac number, because 312643141 - 2¹⁷ = 312512069 is a prime.

It is a super-2 number, since 2×312643141² = 195491467228691762, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312643741) 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, 9195370 + ... + 9195403.

It is an arithmetic number, because the mean of its divisors is an integer number (82758483).

Almost surely, 2^312643141 is an apocalyptic number.

It is an amenable number.

312643141 is a deficient number, since it is larger than the sum of its proper divisors (18390791).

312643141 is a wasteful number, since it uses less digits than its factorization.

312643141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18390790.

The product of its digits is 1728, while the sum is 25.

The square root of 312643141 is about 17681.7177050195. The cubic root of 312643141 is about 678.7080001868.

Adding to 312643141 its reverse (141346213), we get a palindrome (453989354).

The spelling of 312643141 in words is "three hundred twelve million, six hundred forty-three thousand, one hundred forty-one".