55597481 has 2 divisors, whose sum is σ = 55597482. Its totient is φ = 55597480.

The previous prime is 55597453. The next prime is 55597511. The reversal of 55597481 is 18479555.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 46240000 + 9357481 = 6800^2 + 3059^2 .

It is a cyclic number.

It is not a de Polignac number, because 55597481 - 2¹⁸ = 55335337 is a prime.

It is a super-2 number, since 2×55597481² = 6182159787090722, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (55597981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27798740 + 27798741.

It is an arithmetic number, because the mean of its divisors is an integer number (27798741).

Almost surely, 2^55597481 is an apocalyptic number.

It is an amenable number.

55597481 is a deficient number, since it is larger than the sum of its proper divisors (1).

55597481 is an equidigital number, since it uses as much as digits as its factorization.

55597481 is an evil number, because the sum of its binary digits is even.

The product of its digits is 252000, while the sum is 44.

The square root of 55597481 is about 7456.3718389040. The cubic root of 55597481 is about 381.6673753560.

The spelling of 55597481 in words is "fifty-five million, five hundred ninety-seven thousand, four hundred eighty-one".