51485004 has 24 divisors (see below), whose sum is σ = 133479920. Its totient is φ = 17161632.

The previous prime is 51484997. The next prime is 51485009. The reversal of 51485004 is 40058415.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (51485009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 238249 + ... + 238464.

Almost surely, 2^51485004 is an apocalyptic number.

51485004 is a gapful number since it is divisible by the number (54) formed by its first and last digit.

It is an amenable number.

51485004 is an abundant number, since it is smaller than the sum of its proper divisors (81994916).

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

51485004 is a wasteful number, since it uses less digits than its factorization.

51485004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 476726 (or 476718 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 27.

The square root of 51485004 is about 7175.3051503055. The cubic root of 51485004 is about 372.0148277128.

The spelling of 51485004 in words is "fifty-one million, four hundred eighty-five thousand, four".