51554004 has 12 divisors (see below), whose sum is σ = 120292704. Its totient is φ = 17184664.

The previous prime is 51554003. The next prime is 51554029. The reversal of 51554004 is 40045515.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51554003) 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, 2148072 + ... + 2148095.

It is an arithmetic number, because the mean of its divisors is an integer number (10024392).

Almost surely, 2^51554004 is an apocalyptic number.

It is an amenable number.

51554004 is an abundant number, since it is smaller than the sum of its proper divisors (68738700).

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

51554004 is a wasteful number, since it uses less digits than its factorization.

51554004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4296174 (or 4296172 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 24.

The square root of 51554004 is about 7180.1116982955. Note that the first 3 decimals coincide. The cubic root of 51554004 is about 372.1809444619.

Adding to 51554004 its reverse (40045515), we get a palindrome (91599519).

The spelling of 51554004 in words is "fifty-one million, five hundred fifty-four thousand, four".