51951197 has 12 divisors (see below), whose sum is σ = 53809056. Its totient is φ = 50145480.

The previous prime is 51951173. The next prime is 51951217. The reversal of 51951197 is 79115915.

It is not a de Polignac number, because 51951197 - 2¹² = 51947101 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51951197.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51951157) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 318638 + ... + 318800.

It is an arithmetic number, because the mean of its divisors is an integer number (4484088).

Almost surely, 2^51951197 is an apocalyptic number.

It is an amenable number.

51951197 is a deficient number, since it is larger than the sum of its proper divisors (1857859).

51951197 is an equidigital number, since it uses as much as digits as its factorization.

51951197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 368 (or 301 counting only the distinct ones).

The product of its digits is 14175, while the sum is 38.

The square root of 51951197 is about 7207.7178773867. The cubic root of 51951197 is about 373.1343113497.

The spelling of 51951197 in words is "fifty-one million, nine hundred fifty-one thousand, one hundred ninety-seven".