51369497 has 4 divisors (see below), whose sum is σ = 51409536. Its totient is φ = 51329460.

The previous prime is 51369491. The next prime is 51369517. The reversal of 51369497 is 79496315.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 51369497 - 2¹² = 51365401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51369491) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18029 + ... + 20682.

It is an arithmetic number, because the mean of its divisors is an integer number (12852384).

Almost surely, 2^51369497 is an apocalyptic number.

It is an amenable number.

51369497 is a deficient number, since it is larger than the sum of its proper divisors (40039).

51369497 is a wasteful number, since it uses less digits than its factorization.

51369497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40038.

The product of its digits is 204120, while the sum is 44.

The square root of 51369497 is about 7167.2517048029. The cubic root of 51369497 is about 371.7364133642.

The spelling of 51369497 in words is "fifty-one million, three hundred sixty-nine thousand, four hundred ninety-seven".