212938497 has 16 divisors (see below), whose sum is σ = 316312000. Its totient is φ = 141577632.

The previous prime is 212938489. The next prime is 212938499. The reversal of 212938497 is 794839212.

212938497 is a `hidden beast` number, since 2 + 129 + 38 + 497 = 666.

It is not a de Polignac number, because 212938497 - 2³ = 212938489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212938499) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 172 + ... + 20637.

It is an arithmetic number, because the mean of its divisors is an integer number (19769500).

Almost surely, 2^212938497 is an apocalyptic number.

212938497 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

212938497 is a deficient number, since it is larger than the sum of its proper divisors (103373503).

212938497 is a wasteful number, since it uses less digits than its factorization.

212938497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21197 (or 21191 counting only the distinct ones).

The product of its digits is 217728, while the sum is 45.

The square root of 212938497 is about 14592.4123091420. The cubic root of 212938497 is about 597.1517757588.

The spelling of 212938497 in words is "two hundred twelve million, nine hundred thirty-eight thousand, four hundred ninety-seven".