51485031 has 16 divisors (see below), whose sum is σ = 82141920. Its totient is φ = 31682880.

The previous prime is 51485023. The next prime is 51485033. The reversal of 51485031 is 13058415.

51485031 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 51485031 - 2³ = 51485023 is a prime.

It is a super-2 number, since 2×51485031² = 5301416834141922, which contains 22 as substring.

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

It is a nialpdrome in base 13.

It is a junction number, because it is equal to n+sod(n) for n = 51484986 and 51485004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51485033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 72990 + ... + 73691.

It is an arithmetic number, because the mean of its divisors is an integer number (5133870).

Almost surely, 2^51485031 is an apocalyptic number.

51485031 is a deficient number, since it is larger than the sum of its proper divisors (30656889).

51485031 is a wasteful number, since it uses less digits than its factorization.

51485031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146703 (or 146697 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 27.

The square root of 51485031 is about 7175.3070317583. The cubic root of 51485031 is about 372.0148927440.

The spelling of 51485031 in words is "fifty-one million, four hundred eighty-five thousand, thirty-one".