54219961 has 4 divisors (see below), whose sum is σ = 55969024. Its totient is φ = 52470900.

The previous prime is 54219941. The next prime is 54219973. The reversal of 54219961 is 16991245.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 54219961 - 2⁵ = 54219929 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 54219961.

It is not an unprimeable number, because it can be changed into a prime (54219941) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 874485 + ... + 874546.

It is an arithmetic number, because the mean of its divisors is an integer number (13992256).

Almost surely, 2^54219961 is an apocalyptic number.

It is an amenable number.

54219961 is a deficient number, since it is larger than the sum of its proper divisors (1749063).

54219961 is a wasteful number, since it uses less digits than its factorization.

54219961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1749062.

The product of its digits is 19440, while the sum is 37.

The square root of 54219961 is about 7363.4204687767. The cubic root of 54219961 is about 378.4888298867.

It can be divided in two parts, 542 and 19961, that added together give a triangular number (20503 = T₂₀₂).

The spelling of 54219961 in words is "fifty-four million, two hundred nineteen thousand, nine hundred sixty-one".