51622997 has 2 divisors, whose sum is σ = 51622998. Its totient is φ = 51622996.

The previous prime is 51622993. The next prime is 51623003. The reversal of 51622997 is 79922615.

51622997 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 51351556 + 271441 = 7166^2 + 521^2 .

It is a cyclic number.

It is not a de Polignac number, because 51622997 - 2² = 51622993 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51622993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25811498 + 25811499.

It is an arithmetic number, because the mean of its divisors is an integer number (25811499).

Almost surely, 2^51622997 is an apocalyptic number.

It is an amenable number.

51622997 is a deficient number, since it is larger than the sum of its proper divisors (1).

51622997 is an equidigital number, since it uses as much as digits as its factorization.

51622997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 68040, while the sum is 41.

The square root of 51622997 is about 7184.9145436811. The cubic root of 51622997 is about 372.3468962264.

The spelling of 51622997 in words is "fifty-one million, six hundred twenty-two thousand, nine hundred ninety-seven".