1225132550 has 48 divisors (see below), whose sum is σ = 2407613760. Its totient is φ = 463061760.

The previous prime is 1225132537. The next prime is 1225132561. The reversal of 1225132550 is 552315221.

It is a congruent 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, 59162 + ... + 77138.

It is an arithmetic number, because the mean of its divisors is an integer number (50158620).

Almost surely, 2^1225132550 is an apocalyptic number.

1225132550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1225132550 is a deficient number, since it is larger than the sum of its proper divisors (1182481210).

1225132550 is a wasteful number, since it uses less digits than its factorization.

1225132550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18065 (or 18060 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 26.

The square root of 1225132550 is about 35001.8935202083. The cubic root of 1225132550 is about 1070.0260715108.

Adding to 1225132550 its reverse (552315221), we get a palindrome (1777447771).

The spelling of 1225132550 in words is "one billion, two hundred twenty-five million, one hundred thirty-two thousand, five hundred fifty".