55431146 has 4 divisors (see below), whose sum is σ = 83146722. Its totient is φ = 27715572.

The previous prime is 55431137. The next prime is 55431161. The reversal of 55431146 is 64113455.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 30680521 + 24750625 = 5539^2 + 4975^2 .

It is a super-2 number, since 2×55431146² = 6145223893746632, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13857785 + ... + 13857788.

Almost surely, 2^55431146 is an apocalyptic number.

55431146 is a deficient number, since it is larger than the sum of its proper divisors (27715576).

55431146 is a wasteful number, since it uses less digits than its factorization.

55431146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27715575.

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

The square root of 55431146 is about 7445.2096008104. The cubic root of 55431146 is about 381.2863745282.

The spelling of 55431146 in words is "fifty-five million, four hundred thirty-one thousand, one hundred forty-six".