1231503475 has 6 divisors (see below), whose sum is σ = 1527064340. Its totient is φ = 985202760.

The previous prime is 1231503463. The next prime is 1231503509. The reversal of 1231503475 is 5743051321.

It is a happy number.

It is not a de Polignac number, because 1231503475 - 2¹⁵ = 1231470707 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 24630045 + ... + 24630094.

Almost surely, 2^1231503475 is an apocalyptic number.

1231503475 is a deficient number, since it is larger than the sum of its proper divisors (295560865).

1231503475 is an equidigital number, since it uses as much as digits as its factorization.

1231503475 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49260149 (or 49260144 counting only the distinct ones).

The product of its (nonzero) digits is 12600, while the sum is 31.

The square root of 1231503475 is about 35092.7838023717. The cubic root of 1231503475 is about 1071.8776461840.

Adding to 1231503475 its reverse (5743051321), we get a palindrome (6974554796).

The spelling of 1231503475 in words is "one billion, two hundred thirty-one million, five hundred three thousand, four hundred seventy-five".