51901607 has 2 divisors, whose sum is σ = 51901608. Its totient is φ = 51901606.

The previous prime is 51901589. The next prime is 51901609. The reversal of 51901607 is 70610915.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51901607 - 2¹⁸ = 51639463 is a prime.

Together with 51901609, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51901607.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51901609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25950803 + 25950804.

It is an arithmetic number, because the mean of its divisors is an integer number (25950804).

Almost surely, 2^51901607 is an apocalyptic number.

51901607 is a deficient number, since it is larger than the sum of its proper divisors (1).

51901607 is an equidigital number, since it uses as much as digits as its factorization.

51901607 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1890, while the sum is 29.

The square root of 51901607 is about 7204.2769935643. The cubic root of 51901607 is about 373.0155484705.

The spelling of 51901607 in words is "fifty-one million, nine hundred one thousand, six hundred seven".