55724019 has 16 divisors (see below), whose sum is σ = 82596864. Its totient is φ = 33184800.

The previous prime is 55723973. The next prime is 55724027. The reversal of 55724019 is 91042755.

It is not a de Polignac number, because 55724019 - 2⁷ = 55723891 is a prime.

It is a super-2 number, since 2×55724019² = 6210332587024722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (55724219) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21837 + ... + 24254.

It is an arithmetic number, because the mean of its divisors is an integer number (5162304).

Almost surely, 2^55724019 is an apocalyptic number.

55724019 is a deficient number, since it is larger than the sum of its proper divisors (26872845).

55724019 is a wasteful number, since it uses less digits than its factorization.

55724019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46138.

The product of its (nonzero) digits is 12600, while the sum is 33.

The square root of 55724019 is about 7464.8522423421. The cubic root of 55724019 is about 381.9567100053.

It can be divided in two parts, 5572 and 4019, that added together give a triangular number (9591 = T₁₃₈).

The spelling of 55724019 in words is "fifty-five million, seven hundred twenty-four thousand, nineteen".