1263431055 has 16 divisors (see below), whose sum is σ = 2109381120. Its totient is φ = 644532768.

The previous prime is 1263431053. The next prime is 1263431077. The reversal of 1263431055 is 5501343621.

It is not a de Polignac number, because 1263431055 - 2¹ = 1263431053 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1263431051) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1830715 + ... + 1831404.

It is an arithmetic number, because the mean of its divisors is an integer number (131836320).

Almost surely, 2^1263431055 is an apocalyptic number.

1263431055 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1263431055 is a deficient number, since it is larger than the sum of its proper divisors (845950065).

1263431055 is a wasteful number, since it uses less digits than its factorization.

1263431055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3662150.

The product of its (nonzero) digits is 10800, while the sum is 30.

The square root of 1263431055 is about 35544.7753544737. The cubic root of 1263431055 is about 1081.0617858545.

Adding to 1263431055 its reverse (5501343621), we get a palindrome (6764774676).

The spelling of 1263431055 in words is "one billion, two hundred sixty-three million, four hundred thirty-one thousand, fifty-five".