1228633631 has 2 divisors, whose sum is σ = 1228633632. Its totient is φ = 1228633630.

The previous prime is 1228633621. The next prime is 1228633699. The reversal of 1228633631 is 1363368221.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1228633631 - 2²² = 1224439327 is a prime.

It is a super-2 number, since 2×1228633631² = 3019081198448488322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1228633591 and 1228633600.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1228633621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 614316815 + 614316816.

It is an arithmetic number, because the mean of its divisors is an integer number (614316816).

Almost surely, 2^1228633631 is an apocalyptic number.

1228633631 is a deficient number, since it is larger than the sum of its proper divisors (1).

1228633631 is an equidigital number, since it uses as much as digits as its factorization.

1228633631 is an evil number, because the sum of its binary digits is even.

The product of its digits is 31104, while the sum is 35.

The square root of 1228633631 is about 35051.8705777595. The cubic root of 1228633631 is about 1071.0443790216.

The spelling of 1228633631 in words is "one billion, two hundred twenty-eight million, six hundred thirty-three thousand, six hundred thirty-one".