55153731 has 8 divisors (see below), whose sum is σ = 74784960. Its totient is φ = 36145832.

The previous prime is 55153711. The next prime is 55153741. The reversal of 55153731 is 13735155.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 55153731 - 2⁶ = 55153667 is a prime.

It is a super-2 number, since 2×55153731² = 6083868086440722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (55153711) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 155625 + ... + 155978.

It is an arithmetic number, because the mean of its divisors is an integer number (9348120).

Almost surely, 2^55153731 is an apocalyptic number.

55153731 is a deficient number, since it is larger than the sum of its proper divisors (19631229).

55153731 is a wasteful number, since it uses less digits than its factorization.

55153731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 311665.

The product of its digits is 7875, while the sum is 30.

The square root of 55153731 is about 7426.5557965991. Note that the first 3 decimals coincide. The cubic root of 55153731 is about 380.6492386979.

Adding to 55153731 its reverse (13735155), we get a palindrome (68888886).

The spelling of 55153731 in words is "fifty-five million, one hundred fifty-three thousand, seven hundred thirty-one".