55981413 has 6 divisors (see below), whose sum is σ = 80862054. Its totient is φ = 37320936.

The previous prime is 55981363. The next prime is 55981421. The reversal of 55981413 is 31418955.

It can be written as a sum of positive squares in only one way, i.e., 55980324 + 1089 = 7482^2 + 33^2 .

It is not a de Polignac number, because 55981413 - 2¹⁴ = 55965029 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55981463) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3110070 + ... + 3110087.

It is an arithmetic number, because the mean of its divisors is an integer number (13477009).

Almost surely, 2^55981413 is an apocalyptic number.

It is an amenable number.

55981413 is a deficient number, since it is larger than the sum of its proper divisors (24880641).

55981413 is a wasteful number, since it uses less digits than its factorization.

55981413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6220163 (or 6220160 counting only the distinct ones).

The product of its digits is 21600, while the sum is 36.

The square root of 55981413 is about 7482.0727743053. The cubic root of 55981413 is about 382.5439037135.

The spelling of 55981413 in words is "fifty-five million, nine hundred eighty-one thousand, four hundred thirteen".