51497812 has 6 divisors (see below), whose sum is σ = 90121178. Its totient is φ = 25748904.

The previous prime is 51497801. The next prime is 51497819. The reversal of 51497812 is 21879415.

It can be written as a sum of positive squares in only one way, i.e., 51179716 + 318096 = 7154^2 + 564^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51497819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6437223 + ... + 6437230.

Almost surely, 2^51497812 is an apocalyptic number.

It is an amenable number.

51497812 is a deficient number, since it is larger than the sum of its proper divisors (38623366).

51497812 is a wasteful number, since it uses less digits than its factorization.

51497812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12874457 (or 12874455 counting only the distinct ones).

The product of its digits is 20160, while the sum is 37.

The square root of 51497812 is about 7176.1976004009. The cubic root of 51497812 is about 372.0456740466.

The spelling of 51497812 in words is "fifty-one million, four hundred ninety-seven thousand, eight hundred twelve".