213444430103431 has 4 divisors (see below), whose sum is σ = 213445827061600. Its totient is φ = 213443033145264.

The previous prime is 213444430103389. The next prime is 213444430103449. The reversal of 213444430103431 is 134301034444312.

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

It is a cyclic number.

It is not a de Polignac number, because 213444430103431 - 2¹⁷ = 213444429972359 is a prime.

It is a super-2 number, since 2×213444430103431² (a number of 29 digits) 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 (213444430163431) 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, 698249871 + ... + 698555488.

It is an arithmetic number, because the mean of its divisors is an integer number (53361456765400).

Almost surely, 2^{213444430103431} is an apocalyptic number.

213444430103431 is a deficient number, since it is larger than the sum of its proper divisors (1396958169).

213444430103431 is a wasteful number, since it uses less digits than its factorization.

213444430103431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1396958168.

The product of its (nonzero) digits is 165888, while the sum is 37.

Adding to 213444430103431 its reverse (134301034444312), we get a palindrome (347745464547743).

The spelling of 213444430103431 in words is "two hundred thirteen trillion, four hundred forty-four billion, four hundred thirty million, one hundred three thousand, four hundred thirty-one".