51013493 has 2 divisors, whose sum is σ = 51013494. Its totient is φ = 51013492.

The previous prime is 51013439. The next prime is 51013513. The reversal of 51013493 is 39431015.

Together with previous prime (51013439) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 51008164 + 5329 = 7142^2 + 73^2 .

It is a cyclic number.

It is not a de Polignac number, because 51013493 - 2¹⁶ = 50947957 is a prime.

It is a super-2 number, since 2×51013493² = 5204752936122098, which contains 22 as substring.

It is equal to p_3058253 and since 51013493 and 3058253 have the same sum of digits, it is a Honaker prime.

It is a plaindrome in base 14.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51013393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25506746 + 25506747.

It is an arithmetic number, because the mean of its divisors is an integer number (25506747).

Almost surely, 2^51013493 is an apocalyptic number.

It is an amenable number.

51013493 is a deficient number, since it is larger than the sum of its proper divisors (1).

51013493 is an equidigital number, since it uses as much as digits as its factorization.

51013493 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1620, while the sum is 26.

The square root of 51013493 is about 7142.3730650254. The cubic root of 51013493 is about 370.8756785153.

The spelling of 51013493 in words is "fifty-one million, thirteen thousand, four hundred ninety-three".