1553401023225 has 48 divisors (see below), whose sum is σ = 2663545206720. Its totient is φ = 797896915200.

The previous prime is 1553401023217. The next prime is 1553401023241. The reversal of 1553401023225 is 5223201043551.

It is not a de Polignac number, because 1553401023225 - 2³ = 1553401023217 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 36031 + ... + 1762980.

It is an arithmetic number, because the mean of its divisors is an integer number (55490525140).

Almost surely, 2^{1553401023225} is an apocalyptic number.

1553401023225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1553401023225 is a deficient number, since it is larger than the sum of its proper divisors (1110144183495).

1553401023225 is a wasteful number, since it uses less digits than its factorization.

1553401023225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1799450 (or 1799445 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 33.

Adding to 1553401023225 its reverse (5223201043551), we get a palindrome (6776602066776).

The spelling of 1553401023225 in words is "one trillion, five hundred fifty-three billion, four hundred one million, twenty-three thousand, two hundred twenty-five".