51013398 has 32 divisors (see below), whose sum is σ = 104558976. Its totient is φ = 16587648.

The previous prime is 51013393. The next prime is 51013409. The reversal of 51013398 is 89331015.

It is a happy number.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51013393) 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, 44865 + ... + 45987.

It is an arithmetic number, because the mean of its divisors is an integer number (3267468).

Almost surely, 2^51013398 is an apocalyptic number.

51013398 is an abundant number, since it is smaller than the sum of its proper divisors (53545578).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51013398 is a wasteful number, since it uses less digits than its factorization.

51013398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1308.

The product of its (nonzero) digits is 3240, while the sum is 30.

The square root of 51013398 is about 7142.3664145716. The cubic root of 51013398 is about 370.8754482938.

The spelling of 51013398 in words is "fifty-one million, thirteen thousand, three hundred ninety-eight".