51401549 has 4 divisors (see below), whose sum is σ = 51435840. Its totient is φ = 51367260.

The previous prime is 51401533. The next prime is 51401611. The reversal of 51401549 is 94510415.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 94510415 = 5 ⋅18902083.

It is a cyclic number.

It is not a de Polignac number, because 51401549 - 2⁴ = 51401533 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51409549) 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 3 ways as a sum of consecutive naturals, for example, 14789 + ... + 17930.

It is an arithmetic number, because the mean of its divisors is an integer number (12858960).

Almost surely, 2^51401549 is an apocalyptic number.

It is an amenable number.

51401549 is a deficient number, since it is larger than the sum of its proper divisors (34291).

51401549 is a wasteful number, since it uses less digits than its factorization.

51401549 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34290.

The product of its (nonzero) digits is 3600, while the sum is 29.

The square root of 51401549 is about 7169.4873596374. The cubic root of 51401549 is about 371.8137122735.

The spelling of 51401549 in words is "fifty-one million, four hundred one thousand, five hundred forty-nine".