1215100052 has 6 divisors (see below), whose sum is σ = 2126425098. Its totient is φ = 607550024.

The previous prime is 1215100049. The next prime is 1215100079. The reversal of 1215100052 is 2500015121.

It can be written as a sum of positive squares in only one way, i.e., 1111955716 + 103144336 = 33346^2 + 10156^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1215100052.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 151887503 + ... + 151887510.

It is an arithmetic number, because the mean of its divisors is an integer number (354404183).

Almost surely, 2^1215100052 is an apocalyptic number.

It is an amenable number.

1215100052 is a deficient number, since it is larger than the sum of its proper divisors (911325046).

1215100052 is a wasteful number, since it uses less digits than its factorization.

1215100052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 303775017 (or 303775015 counting only the distinct ones).

The product of its (nonzero) digits is 100, while the sum is 17.

The square root of 1215100052 is about 34858.2852705064. The cubic root of 1215100052 is about 1067.0972806080.

Adding to 1215100052 its reverse (2500015121), we get a palindrome (3715115173).

The spelling of 1215100052 in words is "one billion, two hundred fifteen million, one hundred thousand, fifty-two".