51473040 has 80 divisors (see below), whose sum is σ = 163489536. Its totient is φ = 13388800.

The previous prime is 51473039. The next prime is 51473041. The reversal of 51473040 is 4037415.

It is an interprime number because it is at equal distance from previous prime (51473039) and next prime (51473041).

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 51473040.

It is not an unprimeable number, because it can be changed into a prime (51473041) 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, 7225 + ... + 12455.

Almost surely, 2^51473040 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51473040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (81744768).

51473040 is an abundant number, since it is smaller than the sum of its proper divisors (112016496).

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

51473040 is a wasteful number, since it uses less digits than its factorization.

51473040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5288 (or 5282 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 24.

The square root of 51473040 is about 7174.4714091005. The cubic root of 51473040 is about 371.9860094172.

The spelling of 51473040 in words is "fifty-one million, four hundred seventy-three thousand, forty".