55051538 has 4 divisors (see below), whose sum is σ = 82577310. Its totient is φ = 27525768.

The previous prime is 55051537. The next prime is 55051583. The reversal of 55051538 is 83515055.

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., 52171729 + 2879809 = 7223^2 + 1697^2 .

It is not an unprimeable number, because it can be changed into a prime (55051537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13762883 + ... + 13762886.

Almost surely, 2^55051538 is an apocalyptic number.

55051538 is a deficient number, since it is larger than the sum of its proper divisors (27525772).

55051538 is a wasteful number, since it uses less digits than its factorization.

55051538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27525771.

The product of its (nonzero) digits is 15000, while the sum is 32.

The square root of 55051538 is about 7419.6723647342. The cubic root of 55051538 is about 380.4139947888.

The spelling of 55051538 in words is "fifty-five million, fifty-one thousand, five hundred thirty-eight".