51554480 has 20 divisors (see below), whose sum is σ = 119864352. Its totient is φ = 20621760.

The previous prime is 51554443. The next prime is 51554483. The reversal of 51554480 is 8445515.

It is a tau number, because it is divible by the number of its divisors (20).

It is not an unprimeable number, because it can be changed into a prime (51554483) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 322136 + ... + 322295.

Almost surely, 2^51554480 is an apocalyptic number.

It is an amenable number.

51554480 is an abundant number, since it is smaller than the sum of its proper divisors (68309872).

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

51554480 is a wasteful number, since it uses less digits than its factorization.

51554480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 644444 (or 644438 counting only the distinct ones).

The product of its (nonzero) digits is 16000, while the sum is 32.

The square root of 51554480 is about 7180.1448453356. The cubic root of 51554480 is about 372.1820899118.

Adding to 51554480 its reverse (8445515), we get a palindrome (59999995).

The spelling of 51554480 in words is "fifty-one million, five hundred fifty-four thousand, four hundred eighty".