343400642003531 has 24 divisors (see below), whose sum is σ = 410036221210176. Its totient is φ = 286618442369280.

The previous prime is 343400642003491. The next prime is 343400642003539. The reversal of 343400642003531 is 135300246004343.

It is not a de Polignac number, because 343400642003531 - 2⁴² = 339002595492427 is a prime.

It is a super-2 number, since 2×343400642003531² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (343400642003539) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 377998430 + ... + 378905811.

It is an arithmetic number, because the mean of its divisors is an integer number (17084842550424).

Almost surely, 2^{343400642003531} is an apocalyptic number.

343400642003531 is a deficient number, since it is larger than the sum of its proper divisors (66635579206645).

343400642003531 is a wasteful number, since it uses less digits than its factorization.

343400642003531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 756904499 (or 756904492 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 38.

Adding to 343400642003531 its reverse (135300246004343), we get a palindrome (478700888007874).

The spelling of 343400642003531 in words is "three hundred forty-three trillion, four hundred billion, six hundred forty-two million, three thousand, five hundred thirty-one".