51911212 has 6 divisors (see below), whose sum is σ = 90844628. Its totient is φ = 25955604.

The previous prime is 51911129. The next prime is 51911213. The reversal of 51911212 is 21211915.

It is not an unprimeable number, because it can be changed into a prime (51911213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6488898 + ... + 6488905.

Almost surely, 2^51911212 is an apocalyptic number.

It is an amenable number.

51911212 is a deficient number, since it is larger than the sum of its proper divisors (38933416).

51911212 is a wasteful number, since it uses less digits than its factorization.

51911212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12977807 (or 12977805 counting only the distinct ones).

The product of its digits is 180, while the sum is 22.

The square root of 51911212 is about 7204.9435806257. The cubic root of 51911212 is about 373.0385573493.

The spelling of 51911212 in words is "fifty-one million, nine hundred eleven thousand, two hundred twelve".