1521323023 has 8 divisors (see below), whose sum is σ = 1663768656. Its totient is φ = 1379568000.

The previous prime is 1521323021. The next prime is 1521323029. The reversal of 1521323023 is 3203231251.

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

It is a cyclic number.

It is not a de Polignac number, because 1521323023 - 2¹ = 1521323021 is a prime.

It is a super-3 number, since 3×1521323023³ (a number of 29 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1521322985 and 1521323003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1521323021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 168036 + ... + 176857.

It is an arithmetic number, because the mean of its divisors is an integer number (207971082).

Almost surely, 2^1521323023 is an apocalyptic number.

1521323023 is a deficient number, since it is larger than the sum of its proper divisors (142445633).

1521323023 is a wasteful number, since it uses less digits than its factorization.

1521323023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 345305.

The product of its (nonzero) digits is 1080, while the sum is 22.

The square root of 1521323023 is about 39004.1411006575. The cubic root of 1521323023 is about 1150.1129121648.

Adding to 1521323023 its reverse (3203231251), we get a palindrome (4724554274).

The spelling of 1521323023 in words is "one billion, five hundred twenty-one million, three hundred twenty-three thousand, twenty-three".