51394501 has 2 divisors, whose sum is σ = 51394502. Its totient is φ = 51394500.

The previous prime is 51394493. The next prime is 51394523. The reversal of 51394501 is 10549315.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 35402500 + 15992001 = 5950^2 + 3999^2 .

It is a cyclic number.

It is not a de Polignac number, because 51394501 - 2³ = 51394493 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51394501.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51394201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25697250 + 25697251.

It is an arithmetic number, because the mean of its divisors is an integer number (25697251).

Almost surely, 2^51394501 is an apocalyptic number.

It is an amenable number.

51394501 is a deficient number, since it is larger than the sum of its proper divisors (1).

51394501 is an equidigital number, since it uses as much as digits as its factorization.

51394501 is an evil number, because the sum of its binary digits is even.

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

The square root of 51394501 is about 7168.9958153147. The cubic root of 51394501 is about 371.7967175663.

The spelling of 51394501 in words is "fifty-one million, three hundred ninety-four thousand, five hundred one".