51212497 has 6 divisors (see below), whose sum is σ = 59573778. Its totient is φ = 43896384.

The previous prime is 51212479. The next prime is 51212503. The reversal of 51212497 is 79421215.

It can be written as a sum of positive squares in only one way, i.e., 37344321 + 13868176 = 6111^2 + 3724^2 .

It is a de Polignac number, because none of the positive numbers 2^k-51212497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51212407) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 522528 + ... + 522625.

It is an arithmetic number, because the mean of its divisors is an integer number (9928963).

Almost surely, 2^51212497 is an apocalyptic number.

It is an amenable number.

51212497 is a deficient number, since it is larger than the sum of its proper divisors (8361281).

51212497 is a wasteful number, since it uses less digits than its factorization.

51212497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1045167 (or 1045160 counting only the distinct ones).

The product of its digits is 5040, while the sum is 31.

The square root of 51212497 is about 7156.2907291417. The cubic root of 51212497 is about 371.3573156562.

The spelling of 51212497 in words is "fifty-one million, two hundred twelve thousand, four hundred ninety-seven".