212215825 has 12 divisors (see below), whose sum is σ = 274589568. Its totient is φ = 162390800.

The previous prime is 212215819. The next prime is 212215841. The reversal of 212215825 is 528512212.

It is not a de Polignac number, because 212215825 - 2¹¹ = 212213777 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212215793 and 212215802.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 183961 + ... + 185110.

It is an arithmetic number, because the mean of its divisors is an integer number (22882464).

Almost surely, 2^212215825 is an apocalyptic number.

212215825 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

212215825 is a deficient number, since it is larger than the sum of its proper divisors (62373743).

212215825 is a wasteful number, since it uses less digits than its factorization.

212215825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 369104 (or 369099 counting only the distinct ones).

The product of its digits is 3200, while the sum is 28.

The square root of 212215825 is about 14567.6293541537. The cubic root of 212215825 is about 596.4754709572.

The spelling of 212215825 in words is "two hundred twelve million, two hundred fifteen thousand, eight hundred twenty-five".