1215632061 has 24 divisors (see below), whose sum is σ = 2026637184. Its totient is φ = 687765600.

The previous prime is 1215632051. The next prime is 1215632069. The reversal of 1215632061 is 1602365121.

1215632061 is a `hidden beast` number, since 1 + 21 + 5 + 632 + 0 + 6 + 1 = 666.

It is not a de Polignac number, because 1215632061 - 2⁶ = 1215631997 is a prime.

It is a super-2 number, since 2×1215632061² = 2955522615462215442, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1215632069) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 89161 + ... + 101886.

It is an arithmetic number, because the mean of its divisors is an integer number (84443216).

Almost surely, 2^1215632061 is an apocalyptic number.

It is an amenable number.

1215632061 is a deficient number, since it is larger than the sum of its proper divisors (811005123).

1215632061 is a wasteful number, since it uses less digits than its factorization.

1215632061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 191161 (or 191158 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 1215632061 is about 34865.9154619522. The cubic root of 1215632061 is about 1067.2529941295.

Adding to 1215632061 its reverse (1602365121), we get a palindrome (2817997182).

The spelling of 1215632061 in words is "one billion, two hundred fifteen million, six hundred thirty-two thousand, sixty-one".