54921901 has 4 divisors (see below), whose sum is σ = 55085212. Its totient is φ = 54758592.

The previous prime is 54921877. The next prime is 54921929. The reversal of 54921901 is 10912945.

It is the 3026-th star number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 37197801 + 17724100 = 6099^2 + 4210^2 .

It is a cyclic number.

It is not a de Polignac number, because 54921901 - 2⁵ = 54921869 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54921931) 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, 81150 + ... + 81823.

It is an arithmetic number, because the mean of its divisors is an integer number (13771303).

Almost surely, 2^54921901 is an apocalyptic number.

It is an amenable number.

54921901 is a deficient number, since it is larger than the sum of its proper divisors (163311).

54921901 is a wasteful number, since it uses less digits than its factorization.

54921901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163310.

The product of its (nonzero) digits is 3240, while the sum is 31.

The square root of 54921901 is about 7410.9311830566. The cubic root of 54921901 is about 380.1151566964.

The spelling of 54921901 in words is "fifty-four million, nine hundred twenty-one thousand, nine hundred one".