53021242 has 4 divisors (see below), whose sum is σ = 79531866. Its totient is φ = 26510620.

The previous prime is 53021239. The next prime is 53021291. The reversal of 53021242 is 24212035.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24212035 = 5 ⋅4842407.

It can be written as a sum of positive squares in only one way, i.e., 53012961 + 8281 = 7281^2 + 91^2 .

It is a super-2 number, since 2×53021242² = 5622504206445128, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13255309 + ... + 13255312.

Almost surely, 2^53021242 is an apocalyptic number.

53021242 is a deficient number, since it is larger than the sum of its proper divisors (26510624).

53021242 is a wasteful number, since it uses less digits than its factorization.

53021242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26510623.

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 53021242 is about 7281.5686496798. The cubic root of 53021242 is about 375.6787517520.

Adding to 53021242 its reverse (24212035), we get a palindrome (77233277).

The spelling of 53021242 in words is "fifty-three million, twenty-one thousand, two hundred forty-two".