1225132155 has 64 divisors (see below), whose sum is σ = 2358357120. Its totient is φ = 599851008.

The previous prime is 1225132151. The next prime is 1225132169. The reversal of 1225132155 is 5512315221.

1225132155 is a `hidden beast` number, since 122 + 513 + 21 + 5 + 5 = 666.

It is not a de Polignac number, because 1225132155 - 2² = 1225132151 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (1225132151) 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, 336907 + ... + 340523.

It is an arithmetic number, because the mean of its divisors is an integer number (36849330).

Almost surely, 2^1225132155 is an apocalyptic number.

1225132155 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1225132155 is a deficient number, since it is larger than the sum of its proper divisors (1133224965).

1225132155 is a wasteful number, since it uses less digits than its factorization.

1225132155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3837 (or 3831 counting only the distinct ones).

The product of its digits is 3000, while the sum is 27.

The square root of 1225132155 is about 35001.8878776560. The cubic root of 1225132155 is about 1070.0259565136.

Adding to 1225132155 its reverse (5512315221), we get a palindrome (6737447376).

The spelling of 1225132155 in words is "one billion, two hundred twenty-five million, one hundred thirty-two thousand, one hundred fifty-five".