215630732 has 6 divisors (see below), whose sum is σ = 377353788. Its totient is φ = 107815364.

The previous prime is 215630717. The next prime is 215630743. The reversal of 215630732 is 237036512.

It is a super-2 number, since 2×215630732² = 92993225165711648, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 215630695 and 215630704.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26953838 + ... + 26953845.

It is an arithmetic number, because the mean of its divisors is an integer number (62892298).

Almost surely, 2^215630732 is an apocalyptic number.

It is an amenable number.

215630732 is a deficient number, since it is larger than the sum of its proper divisors (161723056).

215630732 is a wasteful number, since it uses less digits than its factorization.

215630732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53907687 (or 53907685 counting only the distinct ones).

The product of its (nonzero) digits is 7560, while the sum is 29.

The square root of 215630732 is about 14684.3703303887. The cubic root of 215630732 is about 599.6578901570.

The spelling of 215630732 in words is "two hundred fifteen million, six hundred thirty thousand, seven hundred thirty-two".