55415501 has 2 divisors, whose sum is σ = 55415502. Its totient is φ = 55415500.

The previous prime is 55415497. The next prime is 55415537. The reversal of 55415501 is 10551455.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 46854025 + 8561476 = 6845^2 + 2926^2 .

It is a cyclic number.

It is not a de Polignac number, because 55415501 - 2² = 55415497 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55415401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27707750 + 27707751.

It is an arithmetic number, because the mean of its divisors is an integer number (27707751).

Almost surely, 2^55415501 is an apocalyptic number.

It is an amenable number.

55415501 is a deficient number, since it is larger than the sum of its proper divisors (1).

55415501 is an equidigital number, since it uses as much as digits as its factorization.

55415501 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2500, while the sum is 26.

The square root of 55415501 is about 7444.1588510724. The cubic root of 55415501 is about 381.2504994708.

Adding to 55415501 its reverse (10551455), we get a palindrome (65966956).

The spelling of 55415501 in words is "fifty-five million, four hundred fifteen thousand, five hundred one".