51196397 has 16 divisors (see below), whose sum is σ = 61119360. Its totient is φ = 41955648.

The previous prime is 51196381. The next prime is 51196403. The reversal of 51196397 is 79369115.

It is not a de Polignac number, because 51196397 - 2⁴ = 51196381 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 (51196337) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20543 + ... + 22899.

It is an arithmetic number, because the mean of its divisors is an integer number (3819960).

Almost surely, 2^51196397 is an apocalyptic number.

It is an amenable number.

51196397 is a deficient number, since it is larger than the sum of its proper divisors (9922963).

51196397 is a wasteful number, since it uses less digits than its factorization.

51196397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2500.

The product of its digits is 51030, while the sum is 41.

The square root of 51196397 is about 7155.1657562910. The cubic root of 51196397 is about 371.3183962532.

The spelling of 51196397 in words is "fifty-one million, one hundred ninety-six thousand, three hundred ninety-seven".