515312150023 has 4 divisors (see below), whose sum is σ = 562158709128. Its totient is φ = 468465590920.

The previous prime is 515312149967. The next prime is 515312150029. The reversal of 515312150023 is 320051213515.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-515312150023 is a prime.

It is a super-2 number, since 2×515312150023² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 515312149973 and 515312150000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (515312150029) 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, 23423279536 + ... + 23423279557.

It is an arithmetic number, because the mean of its divisors is an integer number (140539677282).

Almost surely, 2^515312150023 is an apocalyptic number.

515312150023 is a deficient number, since it is larger than the sum of its proper divisors (46846559105).

515312150023 is a wasteful number, since it uses less digits than its factorization.

515312150023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46846559104.

The product of its (nonzero) digits is 4500, while the sum is 28.

Adding to 515312150023 its reverse (320051213515), we get a palindrome (835363363538).

The spelling of 515312150023 in words is "five hundred fifteen billion, three hundred twelve million, one hundred fifty thousand, twenty-three".