51957197 has 2 divisors, whose sum is σ = 51957198. Its totient is φ = 51957196.

The previous prime is 51957187. The next prime is 51957203. The reversal of 51957197 is 79175915.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 31427236 + 20529961 = 5606^2 + 4531^2 .

It is a cyclic number.

It is not a de Polignac number, because 51957197 - 2⁶ = 51957133 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51957187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25978598 + 25978599.

It is an arithmetic number, because the mean of its divisors is an integer number (25978599).

Almost surely, 2^51957197 is an apocalyptic number.

It is an amenable number.

51957197 is a deficient number, since it is larger than the sum of its proper divisors (1).

51957197 is an equidigital number, since it uses as much as digits as its factorization.

51957197 is an evil number, because the sum of its binary digits is even.

The product of its digits is 99225, while the sum is 44.

The square root of 51957197 is about 7208.1340858783. The cubic root of 51957197 is about 373.1486755981.

The spelling of 51957197 in words is "fifty-one million, nine hundred fifty-seven thousand, one hundred ninety-seven".