55202491 has 2 divisors, whose sum is σ = 55202492. Its totient is φ = 55202490.

The previous prime is 55202471. The next prime is 55202509. The reversal of 55202491 is 19420255.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 55202491 - 2⁷ = 55202363 is a prime.

It is not a weakly prime, because it can be changed into another prime (55202431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27601245 + 27601246.

It is an arithmetic number, because the mean of its divisors is an integer number (27601246).

Almost surely, 2^55202491 is an apocalyptic number.

55202491 is a deficient number, since it is larger than the sum of its proper divisors (1).

55202491 is an equidigital number, since it uses as much as digits as its factorization.

55202491 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3600, while the sum is 28.

The square root of 55202491 is about 7429.8378851762. The cubic root of 55202491 is about 380.7613797360.

The spelling of 55202491 in words is "fifty-five million, two hundred two thousand, four hundred ninety-one".