1351531023 has 4 divisors (see below), whose sum is σ = 1802041368. Its totient is φ = 901020680.

The previous prime is 1351531001. The next prime is 1351531031. The reversal of 1351531023 is 3201351531.

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 1351531023 - 2²⁶ = 1284422159 is a prime.

It is a super-2 number, since 2×1351531023² = 3653272212262853058, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1351530984 and 1351531002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1351531043) 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, 225255168 + ... + 225255173.

It is an arithmetic number, because the mean of its divisors is an integer number (450510342).

Almost surely, 2^1351531023 is an apocalyptic number.

1351531023 is a deficient number, since it is larger than the sum of its proper divisors (450510345).

1351531023 is an equidigital number, since it uses as much as digits as its factorization.

1351531023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 450510344.

The product of its (nonzero) digits is 1350, while the sum is 24.

The square root of 1351531023 is about 36763.1748220961. The cubic root of 1351531023 is about 1105.6270944870.

Adding to 1351531023 its reverse (3201351531), we get a palindrome (4552882554).

The spelling of 1351531023 in words is "one billion, three hundred fifty-one million, five hundred thirty-one thousand, twenty-three".