51223951 has 2 divisors, whose sum is σ = 51223952. Its totient is φ = 51223950.

The previous prime is 51223901. The next prime is 51223961. The reversal of 51223951 is 15932215.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51223951 - 2¹⁵ = 51191183 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51223901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25611975 + 25611976.

It is an arithmetic number, because the mean of its divisors is an integer number (25611976).

Almost surely, 2^51223951 is an apocalyptic number.

51223951 is a deficient number, since it is larger than the sum of its proper divisors (1).

51223951 is an equidigital number, since it uses as much as digits as its factorization.

51223951 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2700, while the sum is 28.

The square root of 51223951 is about 7157.0909593214. The cubic root of 51223951 is about 371.3849990660.

The spelling of 51223951 in words is "fifty-one million, two hundred twenty-three thousand, nine hundred fifty-one".