55151331 has 8 divisors (see below), whose sum is σ = 74222784. Its totient is φ = 36423720.

The previous prime is 55151329. The next prime is 55151339. The reversal of 55151331 is 13315155.

55151331 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 55151331 - 2¹ = 55151329 is a prime.

It is a super-2 number, since 2×55151331² = 6083338622143122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (55151339) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 85585 + ... + 86226.

It is an arithmetic number, because the mean of its divisors is an integer number (9277848).

Almost surely, 2^55151331 is an apocalyptic number.

55151331 is a deficient number, since it is larger than the sum of its proper divisors (19071453).

55151331 is a wasteful number, since it uses less digits than its factorization.

55151331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171921.

The product of its digits is 1125, while the sum is 24.

The square root of 55151331 is about 7426.3942125368. The cubic root of 55151331 is about 380.6437173342.

Adding to 55151331 its reverse (13315155), we get a palindrome (68466486).

The spelling of 55151331 in words is "fifty-five million, one hundred fifty-one thousand, three hundred thirty-one".