51230397 has 4 divisors (see below), whose sum is σ = 68307200. Its totient is φ = 34153596.

The previous prime is 51230393. The next prime is 51230419. The reversal of 51230397 is 79303215.

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 not a de Polignac number, because 51230397 - 2² = 51230393 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51230393) 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, 8538397 + ... + 8538402.

It is an arithmetic number, because the mean of its divisors is an integer number (17076800).

Almost surely, 2^51230397 is an apocalyptic number.

It is an amenable number.

51230397 is a deficient number, since it is larger than the sum of its proper divisors (17076803).

51230397 is a wasteful number, since it uses less digits than its factorization.

51230397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17076802.

The product of its (nonzero) digits is 5670, while the sum is 30.

The square root of 51230397 is about 7157.5412677818. The cubic root of 51230397 is about 371.4005767221.

The spelling of 51230397 in words is "fifty-one million, two hundred thirty thousand, three hundred ninety-seven".