1225161552 has 40 divisors (see below), whose sum is σ = 3168440064. Its totient is φ = 407943424.

The previous prime is 1225161551. The next prime is 1225161557. The reversal of 1225161552 is 2551615221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1225161551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32353 + ... + 59135.

Almost surely, 2^1225161552 is an apocalyptic number.

1225161552 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1225161552 is an abundant number, since it is smaller than the sum of its proper divisors (1943278512).

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

1225161552 is a wasteful number, since it uses less digits than its factorization.

1225161552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27747 (or 27741 counting only the distinct ones).

The product of its digits is 6000, while the sum is 30.

The square root of 1225161552 is about 35002.3078096288. The cubic root of 1225161552 is about 1070.0345148560.

Adding to 1225161552 its reverse (2551615221), we get a palindrome (3776776773).

The spelling of 1225161552 in words is "one billion, two hundred twenty-five million, one hundred sixty-one thousand, five hundred fifty-two".