123515214031 has 8 divisors (see below), whose sum is σ = 140602299264. Its totient is φ = 107404533720.

The previous prime is 123515213947. The next prime is 123515214037. The reversal of 123515214031 is 130412515321.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 123515214031 - 2¹⁹ = 123514689743 is a prime.

It is a super-2 number, since 2×123515214031² (a number of 23 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 (123515214037) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 244100961 + ... + 244101466.

It is an arithmetic number, because the mean of its divisors is an integer number (17575287408).

Almost surely, 2^123515214031 is an apocalyptic number.

123515214031 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

123515214031 is a deficient number, since it is larger than the sum of its proper divisors (17087085233).

123515214031 is a wasteful number, since it uses less digits than its factorization.

123515214031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 488202461.

The product of its (nonzero) digits is 3600, while the sum is 28.

Adding to 123515214031 its reverse (130412515321), we get a palindrome (253927729352).

The spelling of 123515214031 in words is "one hundred twenty-three billion, five hundred fifteen million, two hundred fourteen thousand, thirty-one".