51173212 has 6 divisors (see below), whose sum is σ = 89553128. Its totient is φ = 25586604.

The previous prime is 51173203. The next prime is 51173231. The reversal of 51173212 is 21237115.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6396648 + ... + 6396655.

Almost surely, 2^51173212 is an apocalyptic number.

It is an amenable number.

51173212 is a deficient number, since it is larger than the sum of its proper divisors (38379916).

51173212 is a wasteful number, since it uses less digits than its factorization.

51173212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12793307 (or 12793305 counting only the distinct ones).

The product of its digits is 420, while the sum is 22.

The square root of 51173212 is about 7153.5454146877. The cubic root of 51173212 is about 371.2623355574.

The spelling of 51173212 in words is "fifty-one million, one hundred seventy-three thousand, two hundred twelve".