55903207 has 2 divisors, whose sum is σ = 55903208. Its totient is φ = 55903206.

The previous prime is 55903171. The next prime is 55903219. The reversal of 55903207 is 70230955.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 55903207 - 2¹⁵ = 55870439 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55903277) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27951603 + 27951604.

It is an arithmetic number, because the mean of its divisors is an integer number (27951604).

Almost surely, 2^55903207 is an apocalyptic number.

55903207 is a deficient number, since it is larger than the sum of its proper divisors (1).

55903207 is an equidigital number, since it uses as much as digits as its factorization.

55903207 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9450, while the sum is 31.

The square root of 55903207 is about 7476.8447222074. The cubic root of 55903207 is about 382.3656828291.

The spelling of 55903207 in words is "fifty-five million, nine hundred three thousand, two hundred seven".