1228633501 has 2 divisors, whose sum is σ = 1228633502. Its totient is φ = 1228633500.

The previous prime is 1228633489. The next prime is 1228633547. The reversal of 1228633501 is 1053368221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1173131001 + 55502500 = 34251^2 + 7450^2 .

It is an emirp because it is prime and its reverse (1053368221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1228633501 - 2¹⁵ = 1228600733 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1228633591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 614316750 + 614316751.

It is an arithmetic number, because the mean of its divisors is an integer number (614316751).

Almost surely, 2^1228633501 is an apocalyptic number.

It is an amenable number.

1228633501 is a deficient number, since it is larger than the sum of its proper divisors (1).

1228633501 is an equidigital number, since it uses as much as digits as its factorization.

1228633501 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 1228633501 is about 35051.8687233648. The cubic root of 1228633501 is about 1071.0443412464.

The spelling of 1228633501 in words is "one billion, two hundred twenty-eight million, six hundred thirty-three thousand, five hundred one".