55143641 has 16 divisors (see below), whose sum is σ = 64366848. Its totient is φ = 46267200.

The previous prime is 55143629. The next prime is 55143667. The reversal of 55143641 is 14634155.

It is a happy number.

It is not a de Polignac number, because 55143641 - 2¹⁴ = 55127257 is a prime.

It is a super-2 number, since 2×55143641² = 6081642285473762, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (55143041) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 89651 + ... + 90263.

It is an arithmetic number, because the mean of its divisors is an integer number (4022928).

Almost surely, 2^55143641 is an apocalyptic number.

It is an amenable number.

55143641 is a deficient number, since it is larger than the sum of its proper divisors (9223207).

55143641 is a wasteful number, since it uses less digits than its factorization.

55143641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 872.

The product of its digits is 7200, while the sum is 29.

The square root of 55143641 is about 7425.8764465886. The cubic root of 55143641 is about 380.6260248857.

Adding to 55143641 its reverse (14634155), we get a palindrome (69777796).

The spelling of 55143641 in words is "fifty-five million, one hundred forty-three thousand, six hundred forty-one".