51473994 has 64 divisors (see below), whose sum is σ = 128096640. Its totient is φ = 13547520.

The previous prime is 51473969. The next prime is 51473999. The reversal of 51473994 is 49937415.

It is not an unprimeable number, because it can be changed into a prime (51473999) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12822 + ... + 16350.

It is an arithmetic number, because the mean of its divisors is an integer number (2001510).

Almost surely, 2^51473994 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51473994, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (64048320).

51473994 is an abundant number, since it is smaller than the sum of its proper divisors (76622646).

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

51473994 is a wasteful number, since it uses less digits than its factorization.

51473994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3575.

The product of its digits is 136080, while the sum is 42.

The square root of 51473994 is about 7174.5378945267. The cubic root of 51473994 is about 371.9883075294.

The spelling of 51473994 in words is "fifty-one million, four hundred seventy-three thousand, nine hundred ninety-four".