53215742 has 4 divisors (see below), whose sum is σ = 79823616. Its totient is φ = 26607870.

The previous prime is 53215739. The next prime is 53215753. The reversal of 53215742 is 24751235.

It is a happy number.

53215742 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a super-2 number, since 2×53215742² = 5663830393221128, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13303934 + ... + 13303937.

It is an arithmetic number, because the mean of its divisors is an integer number (19955904).

Almost surely, 2^53215742 is an apocalyptic number.

53215742 is a deficient number, since it is larger than the sum of its proper divisors (26607874).

53215742 is a wasteful number, since it uses less digits than its factorization.

53215742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26607873.

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

The square root of 53215742 is about 7294.9120625269. The cubic root of 53215742 is about 376.1375637811.

Adding to 53215742 its reverse (24751235), we get a palindrome (77966977).

The spelling of 53215742 in words is "fifty-three million, two hundred fifteen thousand, seven hundred forty-two".