55151636 has 6 divisors (see below), whose sum is σ = 96515370. Its totient is φ = 27575816.

The previous prime is 55151627. The next prime is 55151639. The reversal of 55151636 is 63615155.

It can be written as a sum of positive squares in only one way, i.e., 35402500 + 19749136 = 5950^2 + 4444^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55151639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6893951 + ... + 6893958.

It is an arithmetic number, because the mean of its divisors is an integer number (16085895).

Almost surely, 2^55151636 is an apocalyptic number.

It is an amenable number.

55151636 is a deficient number, since it is larger than the sum of its proper divisors (41363734).

55151636 is a wasteful number, since it uses less digits than its factorization.

55151636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13787913 (or 13787911 counting only the distinct ones).

The product of its digits is 13500, while the sum is 32.

The square root of 55151636 is about 7426.4147473731. The cubic root of 55151636 is about 380.6444190164.

The spelling of 55151636 in words is "fifty-five million, one hundred fifty-one thousand, six hundred thirty-six".