1615222272 has 160 divisors (see below), whose sum is σ = 4480150752. Its totient is φ = 516685824.

The previous prime is 1615222261. The next prime is 1615222283. The reversal of 1615222272 is 2722225161.

It is an interprime number because it is at equal distance from previous prime (1615222261) and next prime (1615222283).

Its product of digits (6720) is a multiple of the sum of its prime factors (448).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5512558 + ... + 5512850.

Almost surely, 2^1615222272 is an apocalyptic number.

1615222272 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1615222272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2240075376).

1615222272 is an abundant number, since it is smaller than the sum of its proper divisors (2864928480).

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

1615222272 is an equidigital number, since it uses as much as digits as its factorization.

1615222272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 448 (or 432 counting only the distinct ones).

The product of its digits is 6720, while the sum is 30.

The square root of 1615222272 is about 40189.8279667878. The cubic root of 1615222272 is about 1173.3045768894.

The spelling of 1615222272 in words is "one billion, six hundred fifteen million, two hundred twenty-two thousand, two hundred seventy-two".