123415543131 has 4 divisors (see below), whose sum is σ = 164554057512. Its totient is φ = 82277028752.

The previous prime is 123415543099. The next prime is 123415543133. The reversal of 123415543131 is 131345514321.

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 123415543131 - 2⁵ = 123415543099 is a prime.

It is a super-2 number, since 2×123415543131² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 123415543092 and 123415543101.

It is not an unprimeable number, because it can be changed into a prime (123415543133) 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, 20569257186 + ... + 20569257191.

It is an arithmetic number, because the mean of its divisors is an integer number (41138514378).

Almost surely, 2^123415543131 is an apocalyptic number.

123415543131 is a deficient number, since it is larger than the sum of its proper divisors (41138514381).

123415543131 is an equidigital number, since it uses as much as digits as its factorization.

123415543131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41138514380.

The product of its digits is 21600, while the sum is 33.

The spelling of 123415543131 in words is "one hundred twenty-three billion, four hundred fifteen million, five hundred forty-three thousand, one hundred thirty-one".