201510143023 has 4 divisors (see below), whose sum is σ = 230297306320. Its totient is φ = 172722979728.

The previous prime is 201510142979. The next prime is 201510143039. The reversal of 201510143023 is 320341015102.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 320341015102 = 2 ⋅160170507551.

It is a cyclic number.

It is not a de Polignac number, because 201510143023 - 2²⁵ = 201476588591 is a prime.

It is a super-2 number, since 2×201510143023² (a number of 23 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 = 201510142985 and 201510143003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201510143083) 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, 14393581638 + ... + 14393581651.

It is an arithmetic number, because the mean of its divisors is an integer number (57574326580).

Almost surely, 2^201510143023 is an apocalyptic number.

201510143023 is a deficient number, since it is larger than the sum of its proper divisors (28787163297).

201510143023 is an equidigital number, since it uses as much as digits as its factorization.

201510143023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28787163296.

The product of its (nonzero) digits is 720, while the sum is 22.

Adding to 201510143023 its reverse (320341015102), we get a palindrome (521851158125).

The spelling of 201510143023 in words is "two hundred one billion, five hundred ten million, one hundred forty-three thousand, twenty-three".