1225151488 has 88 divisors (see below), whose sum is σ = 2788505280. Its totient is φ = 532561920.

The previous prime is 1225151479. The next prime is 1225151489. The reversal of 1225151488 is 8841515221.

It is a tau number, because it is divible by the number of its divisors (88).

It is a super-2 number, since 2×1225151488² = 3001992337097228288, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1225151489) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 256708 + ... + 261436.

It is an arithmetic number, because the mean of its divisors is an integer number (31687560).

Almost surely, 2^1225151488 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1225151488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1394252640).

1225151488 is an abundant number, since it is smaller than the sum of its proper divisors (1563353792).

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

1225151488 is a wasteful number, since it uses less digits than its factorization.

1225151488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4783 (or 4765 counting only the distinct ones).

The product of its digits is 25600, while the sum is 37.

The square root of 1225151488 is about 35002.1640473843. The cubic root of 1225151488 is about 1070.0315849412.

The spelling of 1225151488 in words is "one billion, two hundred twenty-five million, one hundred fifty-one thousand, four hundred eighty-eight".