51258399 has 16 divisors (see below), whose sum is σ = 70917120. Its totient is φ = 32893280.

The previous prime is 51258397. The next prime is 51258401. The reversal of 51258399 is 99385215.

It is an interprime number because it is at equal distance from previous prime (51258397) and next prime (51258401).

It is a cyclic number.

It is not a de Polignac number, because 51258399 - 2¹ = 51258397 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51258399.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51258397) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36814 + ... + 38180.

It is an arithmetic number, because the mean of its divisors is an integer number (4432320).

Almost surely, 2^51258399 is an apocalyptic number.

51258399 is a deficient number, since it is larger than the sum of its proper divisors (19658721).

51258399 is a wasteful number, since it uses less digits than its factorization.

51258399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1830.

The product of its digits is 97200, while the sum is 42.

The square root of 51258399 is about 7159.4971192117. The cubic root of 51258399 is about 371.4682322893.

The spelling of 51258399 in words is "fifty-one million, two hundred fifty-eight thousand, three hundred ninety-nine".