1225554255250 has 128 divisors (see below), whose sum is σ = 2530672784640. Its totient is φ = 441552384000.

The previous prime is 1225554255227. The next prime is 1225554255251. The reversal of 1225554255250 is 525524555221.

It is a super-2 number, since 2×1225554255250² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a junction number, because it is equal to n+sod(n) for n = 1225554255197 and 1225554255206.

It is not an unprimeable number, because it can be changed into a prime (1225554255251) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 163643506 + ... + 163650994.

It is an arithmetic number, because the mean of its divisors is an integer number (19770881130).

Almost surely, 2^{1225554255250} is an apocalyptic number.

1225554255250 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1225554255250 is an abundant number, since it is smaller than the sum of its proper divisors (1305118529390).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1225554255250 is a wasteful number, since it uses less digits than its factorization.

1225554255250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8733 (or 8723 counting only the distinct ones).

The product of its (nonzero) digits is 1000000, while the sum is 43.

The spelling of 1225554255250 in words is "one trillion, two hundred twenty-five billion, five hundred fifty-four million, two hundred fifty-five thousand, two hundred fifty".