1225155554205 has 32 divisors (see below), whose sum is σ = 2147326651008. Its totient is φ = 591550003200.

The previous prime is 1225155554177. The next prime is 1225155554269. The reversal of 1225155554205 is 5024555515221.

It is not a de Polignac number, because 1225155554205 - 2⁵ = 1225155554173 is a prime.

It is a super-2 number, since 2×1225155554205² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15365184 + ... + 15444713.

It is an arithmetic number, because the mean of its divisors is an integer number (67103957844).

Almost surely, 2^{1225155554205} is an apocalyptic number.

1225155554205 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1225155554205 is a deficient number, since it is larger than the sum of its proper divisors (922171096803).

1225155554205 is a wasteful number, since it uses less digits than its factorization.

1225155554205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30810157.

The product of its (nonzero) digits is 500000, while the sum is 42.

The spelling of 1225155554205 in words is "one trillion, two hundred twenty-five billion, one hundred fifty-five million, five hundred fifty-four thousand, two hundred five".