53454721 has 2 divisors, whose sum is σ = 53454722. Its totient is φ = 53454720.

The previous prime is 53454707. The next prime is 53454781. The reversal of 53454721 is 12745435.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 48441600 + 5013121 = 6960^2 + 2239^2 .

It is a cyclic number.

It is not a de Polignac number, because 53454721 - 2⁷ = 53454593 is a prime.

It is not a weakly prime, because it can be changed into another prime (53454701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26727360 + 26727361.

It is an arithmetic number, because the mean of its divisors is an integer number (26727361).

Almost surely, 2^53454721 is an apocalyptic number.

It is an amenable number.

53454721 is a deficient number, since it is larger than the sum of its proper divisors (1).

53454721 is an equidigital number, since it uses as much as digits as its factorization.

53454721 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16800, while the sum is 31.

The square root of 53454721 is about 7311.2735552707. The cubic root of 53454721 is about 376.6997705871.

It can be divided in two parts, 534 and 54721, that added together give a palindrome (55255).

The spelling of 53454721 in words is "fifty-three million, four hundred fifty-four thousand, seven hundred twenty-one".