55061613 has 24 divisors (see below), whose sum is σ = 82843488. Its totient is φ = 36545904.

The previous prime is 55061603. The next prime is 55061621. The reversal of 55061613 is 31616055.

It is a happy number.

It is not a de Polignac number, because 55061613 - 2⁴ = 55061597 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55061603) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 83995 + ... + 84647.

It is an arithmetic number, because the mean of its divisors is an integer number (3451812).

Almost surely, 2^55061613 is an apocalyptic number.

It is an amenable number.

55061613 is a deficient number, since it is larger than the sum of its proper divisors (27781875).

55061613 is an equidigital number, since it uses as much as digits as its factorization.

55061613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1015 (or 1003 counting only the distinct ones).

The product of its (nonzero) digits is 2700, while the sum is 27.

The square root of 55061613 is about 7420.3512720086. The cubic root of 55061613 is about 380.4371999366.

Adding to 55061613 its reverse (31616055), we get a palindrome (86677668).

The spelling of 55061613 in words is "fifty-five million, sixty-one thousand, six hundred thirteen".