51623197 has 2 divisors, whose sum is σ = 51623198. Its totient is φ = 51623196.

The previous prime is 51623179. The next prime is 51623227. The reversal of 51623197 is 79132615.

Together with previous prime (51623179) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 44542276 + 7080921 = 6674^2 + 2661^2 .

It is a cyclic number.

It is not a de Polignac number, because 51623197 - 2¹⁹ = 51098909 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51623137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25811598 + 25811599.

It is an arithmetic number, because the mean of its divisors is an integer number (25811599).

Almost surely, 2^51623197 is an apocalyptic number.

It is an amenable number.

51623197 is a deficient number, since it is larger than the sum of its proper divisors (1).

51623197 is an equidigital number, since it uses as much as digits as its factorization.

51623197 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11340, while the sum is 34.

The square root of 51623197 is about 7184.9284617176. The cubic root of 51623197 is about 372.3473770798.

The spelling of 51623197 in words is "fifty-one million, six hundred twenty-three thousand, one hundred ninety-seven".