51545654 has 4 divisors (see below), whose sum is σ = 77318484. Its totient is φ = 25772826.

The previous prime is 51545647. The next prime is 51545657. The reversal of 51545654 is 45654515.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 45654515 = 5 ⋅9130903.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51545657) 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 as a sum of consecutive naturals, namely, 12886412 + ... + 12886415.

It is an arithmetic number, because the mean of its divisors is an integer number (19329621).

Almost surely, 2^51545654 is an apocalyptic number.

51545654 is a deficient number, since it is larger than the sum of its proper divisors (25772830).

51545654 is a wasteful number, since it uses less digits than its factorization.

51545654 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25772829.

The product of its digits is 60000, while the sum is 35.

The square root of 51545654 is about 7179.5302074718. The cubic root of 51545654 is about 372.1608498139.

The spelling of 51545654 in words is "fifty-one million, five hundred forty-five thousand, six hundred fifty-four".