55742319 has 12 divisors (see below), whose sum is σ = 82389736. Its totient is φ = 36297072.

The previous prime is 55742299. The next prime is 55742339. The reversal of 55742319 is 91324755.

It is an interprime number because it is at equal distance from previous prime (55742299) and next prime (55742339).

It is not a de Polignac number, because 55742319 - 2⁵ = 55742287 is a prime.

It is a super-2 number, since 2×55742319² = 6214412254995522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55742339) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 71632 + ... + 72405.

Almost surely, 2^55742319 is an apocalyptic number.

55742319 is a deficient number, since it is larger than the sum of its proper divisors (26647417).

55742319 is a wasteful number, since it uses less digits than its factorization.

55742319 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144086 (or 144083 counting only the distinct ones).

The product of its digits is 37800, while the sum is 36.

The square root of 55742319 is about 7466.0778860122. The cubic root of 55742319 is about 381.9985174874.

The spelling of 55742319 in words is "fifty-five million, seven hundred forty-two thousand, three hundred nineteen".