1553233021225 has 24 divisors (see below), whose sum is σ = 1973241313848. Its totient is φ = 1212121804800.

The previous prime is 1553233021213. The next prime is 1553233021273. The reversal of 1553233021225 is 5221203323551.

It can be written as a sum of positive squares in 12 ways, for example, as 576166011136 + 977067010089 = 759056^2 + 988467^2 .

It is not a de Polignac number, because 1553233021225 - 2²⁷ = 1553098803497 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8122917 + ... + 8311933.

It is an arithmetic number, because the mean of its divisors is an integer number (82218388077).

Almost surely, 2^{1553233021225} is an apocalyptic number.

It is an amenable number.

1553233021225 is a deficient number, since it is larger than the sum of its proper divisors (420008292623).

1553233021225 is a wasteful number, since it uses less digits than its factorization.

1553233021225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197085 (or 197080 counting only the distinct ones).

The product of its (nonzero) digits is 54000, while the sum is 34.

Adding to 1553233021225 its reverse (5221203323551), we get a palindrome (6774436344776).

The spelling of 1553233021225 in words is "one trillion, five hundred fifty-three billion, two hundred thirty-three million, twenty-one thousand, two hundred twenty-five".