55402426 has 4 divisors (see below), whose sum is σ = 83103642. Its totient is φ = 27701212.

The previous prime is 55402409. The next prime is 55402429. The reversal of 55402426 is 62420455.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 62420455 = 5 ⋅12484091.

It can be written as a sum of positive squares in only one way, i.e., 55279225 + 123201 = 7435^2 + 351^2 .

It is a junction number, because it is equal to n+sod(n) for n = 55402394 and 55402403.

It is not an unprimeable number, because it can be changed into a prime (55402429) by changing a digit.

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, 13850605 + ... + 13850608.

Almost surely, 2^55402426 is an apocalyptic number.

55402426 is a deficient number, since it is larger than the sum of its proper divisors (27701216).

55402426 is a wasteful number, since it uses less digits than its factorization.

55402426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27701215.

The product of its (nonzero) digits is 9600, while the sum is 28.

The square root of 55402426 is about 7443.2805939317. The cubic root of 55402426 is about 381.2205124197.

The spelling of 55402426 in words is "fifty-five million, four hundred two thousand, four hundred twenty-six".