55851007 has 2 divisors, whose sum is σ = 55851008. Its totient is φ = 55851006.

The previous prime is 55850953. The next prime is 55851017. The reversal of 55851007 is 70015855.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 55851007 - 2¹⁵ = 55818239 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 55851007.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55851017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27925503 + 27925504.

It is an arithmetic number, because the mean of its divisors is an integer number (27925504).

Almost surely, 2^55851007 is an apocalyptic number.

55851007 is a deficient number, since it is larger than the sum of its proper divisors (1).

55851007 is an equidigital number, since it uses as much as digits as its factorization.

55851007 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7000, while the sum is 31.

The square root of 55851007 is about 7473.3531296199. The cubic root of 55851007 is about 382.2466335809.

The spelling of 55851007 in words is "fifty-five million, eight hundred fifty-one thousand, seven".