1231440063 has 32 divisors (see below), whose sum is σ = 1982103552. Its totient is φ = 665128800.

The previous prime is 1231440053. The next prime is 1231440097. The reversal of 1231440063 is 3600441321.

1231440063 is nontrivially palindromic in base 6.

It is not a de Polignac number, because 1231440063 - 2⁴ = 1231440047 is a prime.

It is a super-2 number, since 2×1231440063² = 3032889257522887938, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231440013) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5998 + ... + 49988.

It is an arithmetic number, because the mean of its divisors is an integer number (61940736).

Almost surely, 2^1231440063 is an apocalyptic number.

1231440063 is a deficient number, since it is larger than the sum of its proper divisors (750663489).

1231440063 is a wasteful number, since it uses less digits than its factorization.

1231440063 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44075.

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 1231440063 is about 35091.8803001492. The cubic root of 1231440063 is about 1071.8592483277.

Adding to 1231440063 its reverse (3600441321), we get a palindrome (4831881384).

The spelling of 1231440063 in words is "one billion, two hundred thirty-one million, four hundred forty thousand, sixty-three".