1522157216 has 12 divisors (see below), whose sum is σ = 2996747082. Its totient is φ = 761078592.

The previous prime is 1522157209. The next prime is 1522157239. The reversal of 1522157216 is 6127512251.

It can be written as a sum of positive squares in only one way, i.e., 1197436816 + 324720400 = 34604^2 + 18020^2 .

It is a Harshad number since it is a multiple of its sum of digits (32), and also a Moran number because the ratio is a prime number: 47567413 = 1522157216 / (1 + 5 + 2 + 2 + 1 + 5 + 7 + 2 + 1 + 6).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23783675 + ... + 23783738.

Almost surely, 2^1522157216 is an apocalyptic number.

1522157216 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1522157216 is a deficient number, since it is larger than the sum of its proper divisors (1474589866).

1522157216 is an equidigital number, since it uses as much as digits as its factorization.

1522157216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47567423 (or 47567415 counting only the distinct ones).

The product of its digits is 8400, while the sum is 32.

The square root of 1522157216 is about 39014.8332817148. The cubic root of 1522157216 is about 1150.3230890568.

Adding to 1522157216 its reverse (6127512251), we get a palindrome (7649669467).

The spelling of 1522157216 in words is "one billion, five hundred twenty-two million, one hundred fifty-seven thousand, two hundred sixteen".