55153642 has 4 divisors (see below), whose sum is σ = 82730466. Its totient is φ = 27576820.

The previous prime is 55153639. The next prime is 55153667. The reversal of 55153642 is 24635155.

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., 37589161 + 17564481 = 6131^2 + 4191^2 .

It is a super-3 number, since 3×55153642³ (a number of 24 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13788409 + ... + 13788412.

Almost surely, 2^55153642 is an apocalyptic number.

55153642 is a deficient number, since it is larger than the sum of its proper divisors (27576824).

55153642 is a wasteful number, since it uses less digits than its factorization.

55153642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27576823.

The product of its digits is 18000, while the sum is 31.

The square root of 55153642 is about 7426.5498045862. The cubic root of 55153642 is about 380.6490339502.

Adding to 55153642 its reverse (24635155), we get a palindrome (79788797).

The spelling of 55153642 in words is "fifty-five million, one hundred fifty-three thousand, six hundred forty-two".