55021151 has 2 divisors, whose sum is σ = 55021152. Its totient is φ = 55021150.

The previous prime is 55021117. The next prime is 55021157. The reversal of 55021151 is 15112055.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 55021151 - 2¹⁴ = 55004767 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55021157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27510575 + 27510576.

It is an arithmetic number, because the mean of its divisors is an integer number (27510576).

Almost surely, 2^55021151 is an apocalyptic number.

55021151 is a deficient number, since it is larger than the sum of its proper divisors (1).

55021151 is an equidigital number, since it uses as much as digits as its factorization.

55021151 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 250, while the sum is 20.

The square root of 55021151 is about 7417.6243501542. The cubic root of 55021151 is about 380.3439890693.

The spelling of 55021151 in words is "fifty-five million, twenty-one thousand, one hundred fifty-one".