55242371 has 4 divisors (see below), whose sum is σ = 56066952. Its totient is φ = 54417792.

The previous prime is 55242359. The next prime is 55242391. The reversal of 55242371 is 17324255.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55242371 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55242301) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 412190 + ... + 412323.

It is an arithmetic number, because the mean of its divisors is an integer number (14016738).

Almost surely, 2^55242371 is an apocalyptic number.

55242371 is a deficient number, since it is larger than the sum of its proper divisors (824581).

55242371 is an equidigital number, since it uses as much as digits as its factorization.

55242371 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 824580.

The product of its digits is 8400, while the sum is 29.

The square root of 55242371 is about 7432.5211738683. The cubic root of 55242371 is about 380.8530489607.

The spelling of 55242371 in words is "fifty-five million, two hundred forty-two thousand, three hundred seventy-one".