55150078 has 4 divisors (see below), whose sum is σ = 82725120. Its totient is φ = 27575038.

The previous prime is 55150063. The next prime is 55150099. The reversal of 55150078 is 87005155.

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

It is a super-2 number, since 2×55150078² = 6083062206812168, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13787518 + ... + 13787521.

It is an arithmetic number, because the mean of its divisors is an integer number (20681280).

Almost surely, 2^55150078 is an apocalyptic number.

55150078 is a deficient number, since it is larger than the sum of its proper divisors (27575042).

55150078 is a wasteful number, since it uses less digits than its factorization.

55150078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27575041.

The product of its (nonzero) digits is 7000, while the sum is 31.

The square root of 55150078 is about 7426.3098507940. The cubic root of 55150078 is about 380.6408346586.

The spelling of 55150078 in words is "fifty-five million, one hundred fifty thousand, seventy-eight".