51905498 has 4 divisors (see below), whose sum is σ = 77858250. Its totient is φ = 25952748.

The previous prime is 51905489. The next prime is 51905509. The reversal of 51905498 is 89450915.

It is a happy number.

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., 29560969 + 22344529 = 5437^2 + 4727^2 .

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, 12976373 + ... + 12976376.

Almost surely, 2^51905498 is an apocalyptic number.

51905498 is a deficient number, since it is larger than the sum of its proper divisors (25952752).

51905498 is a wasteful number, since it uses less digits than its factorization.

51905498 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25952751.

The product of its (nonzero) digits is 64800, while the sum is 41.

The square root of 51905498 is about 7204.5470364208. The cubic root of 51905498 is about 373.0248697441.

The spelling of 51905498 in words is "fifty-one million, nine hundred five thousand, four hundred ninety-eight".