1215520552 has 16 divisors (see below), whose sum is σ = 2279633940. Its totient is φ = 607618176.

The previous prime is 1215520543. The next prime is 1215520561. The reversal of 1215520552 is 2550255121.

It is an interprime number because it is at equal distance from previous prime (1215520543) and next prime (1215520561).

It can be written as a sum of positive squares in 2 ways, for example, as 1205061796 + 10458756 = 34714^2 + 3234^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1215520552.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24508 + ... + 55060.

Almost surely, 2^1215520552 is an apocalyptic number.

It is an amenable number.

1215520552 is a deficient number, since it is larger than the sum of its proper divisors (1064113388).

1215520552 is a wasteful number, since it uses less digits than its factorization.

1215520552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35532 (or 35528 counting only the distinct ones).

The product of its (nonzero) digits is 5000, while the sum is 28.

The square root of 1215520552 is about 34864.3163133884. The cubic root of 1215520552 is about 1067.2203603645.

Adding to 1215520552 its reverse (2550255121), we get a palindrome (3765775673).

The spelling of 1215520552 in words is "one billion, two hundred fifteen million, five hundred twenty thousand, five hundred fifty-two".