51491754 has 16 divisors (see below), whose sum is σ = 114426240. Its totient is φ = 17163900.

The previous prime is 51491731. The next prime is 51491773. The reversal of 51491754 is 45719415.

51491754 is a `hidden beast` number, since 514 + 91 + 7 + 54 = 666.

51491754 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 476722 + ... + 476829.

It is an arithmetic number, because the mean of its divisors is an integer number (7151640).

Almost surely, 2^51491754 is an apocalyptic number.

51491754 is a gapful number since it is divisible by the number (54) formed by its first and last digit.

51491754 is an abundant number, since it is smaller than the sum of its proper divisors (62934486).

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

51491754 is a wasteful number, since it uses less digits than its factorization.

51491754 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 953562 (or 953556 counting only the distinct ones).

The product of its digits is 25200, while the sum is 36.

The square root of 51491754 is about 7175.7754981605. The cubic root of 51491754 is about 372.0310848114.

It can be divided in two parts, 5149 and 1754, that added together give a triangular number (6903 = T₁₁₇).

The spelling of 51491754 in words is "fifty-one million, four hundred ninety-one thousand, seven hundred fifty-four".