55950391 has 8 divisors (see below), whose sum is σ = 64011680. Its totient is φ = 47906208.

The previous prime is 55950361. The next prime is 55950403. The reversal of 55950391 is 19305955.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 55950391 - 2¹⁷ = 55819319 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 55950391.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55950311) 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, 3745 + ... + 11221.

It is an arithmetic number, because the mean of its divisors is an integer number (8001460).

Almost surely, 2^55950391 is an apocalyptic number.

55950391 is a deficient number, since it is larger than the sum of its proper divisors (8061289).

55950391 is a wasteful number, since it uses less digits than its factorization.

55950391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8553.

The product of its (nonzero) digits is 30375, while the sum is 37.

The square root of 55950391 is about 7479.9993983957. Note that the first 3 decimals coincide. The cubic root of 55950391 is about 382.4732286502.

The spelling of 55950391 in words is "fifty-five million, nine hundred fifty thousand, three hundred ninety-one".