123201553 has 2 divisors, whose sum is σ = 123201554. Its totient is φ = 123201552.

The previous prime is 123201473. The next prime is 123201563. The reversal of 123201553 is 355102321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 101364624 + 21836929 = 10068^2 + 4673^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123201553 is a prime.

It is a super-2 number, since 2×123201553² = 30357245323223618, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (123201563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61600776 + 61600777.

It is an arithmetic number, because the mean of its divisors is an integer number (61600777).

Almost surely, 2^123201553 is an apocalyptic number.

It is an amenable number.

123201553 is a deficient number, since it is larger than the sum of its proper divisors (1).

123201553 is an equidigital number, since it uses as much as digits as its factorization.

123201553 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 900, while the sum is 22.

The square root of 123201553 is about 11099.6194979828. The cubic root of 123201553 is about 497.5904777237.

Adding to 123201553 its reverse (355102321), we get a palindrome (478303874).

The spelling of 123201553 in words is "one hundred twenty-three million, two hundred one thousand, five hundred fifty-three".