55031147 has 2 divisors, whose sum is σ = 55031148. Its totient is φ = 55031146.

The previous prime is 55031101. The next prime is 55031167. The reversal of 55031147 is 74113055.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 55031147 - 2⁶ = 55031083 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (55031167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27515573 + 27515574.

It is an arithmetic number, because the mean of its divisors is an integer number (27515574).

Almost surely, 2^55031147 is an apocalyptic number.

55031147 is a deficient number, since it is larger than the sum of its proper divisors (1).

55031147 is an equidigital number, since it uses as much as digits as its factorization.

55031147 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2100, while the sum is 26.

The square root of 55031147 is about 7418.2981201890. The cubic root of 55031147 is about 380.3670207473.

The spelling of 55031147 in words is "fifty-five million, thirty-one thousand, one hundred forty-seven".