1225315550 has 12 divisors (see below), whose sum is σ = 2279087016. Its totient is φ = 490126200.

The previous prime is 1225315493. The next prime is 1225315583. The reversal of 1225315550 is 555135221.

It is a hoax number, since the sum of its digits (29) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12253106 + ... + 12253205.

It is an arithmetic number, because the mean of its divisors is an integer number (189923918).

Almost surely, 2^1225315550 is an apocalyptic number.

1225315550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1225315550 is a deficient number, since it is larger than the sum of its proper divisors (1053771466).

1225315550 is a wasteful number, since it uses less digits than its factorization.

1225315550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24506323 (or 24506318 counting only the distinct ones).

The product of its (nonzero) digits is 7500, while the sum is 29.

The square root of 1225315550 is about 35004.5075668834. The cubic root of 1225315550 is about 1070.0793460244.

The spelling of 1225315550 in words is "one billion, two hundred twenty-five million, three hundred fifteen thousand, five hundred fifty".