55039311 has 8 divisors (see below), whose sum is σ = 81539760. Its totient is φ = 36692856.

The previous prime is 55039307. The next prime is 55039351. The reversal of 55039311 is 11393055.

It is not a de Polignac number, because 55039311 - 2² = 55039307 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 2038493 = 55039311 / (5 + 5 + 0 + 3 + 9 + 3 + 1 + 1).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55039351) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1019220 + ... + 1019273.

It is an arithmetic number, because the mean of its divisors is an integer number (10192470).

Almost surely, 2^55039311 is an apocalyptic number.

55039311 is a deficient number, since it is larger than the sum of its proper divisors (26500449).

55039311 is a wasteful number, since it uses less digits than its factorization.

55039311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2038502 (or 2038496 counting only the distinct ones).

The product of its (nonzero) digits is 2025, while the sum is 27.

The square root of 55039311 is about 7418.8483607633. The cubic root of 55039311 is about 380.3858292644.

The spelling of 55039311 in words is "fifty-five million, thirty-nine thousand, three hundred eleven".