51055402 has 4 divisors (see below), whose sum is σ = 76583106. Its totient is φ = 25527700.

The previous prime is 51055387. The next prime is 51055427. The reversal of 51055402 is 20455015.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 49126081 + 1929321 = 7009^2 + 1389^2 .

It is an unprimeable number.

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, 12763849 + ... + 12763852.

Almost surely, 2^51055402 is an apocalyptic number.

51055402 is a deficient number, since it is larger than the sum of its proper divisors (25527704).

51055402 is a wasteful number, since it uses less digits than its factorization.

51055402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25527703.

The product of its (nonzero) digits is 1000, while the sum is 22.

The square root of 51055402 is about 7145.3062915455. The cubic root of 51055402 is about 370.9772122697.

The spelling of 51055402 in words is "fifty-one million, fifty-five thousand, four hundred two".