55156319 has 2 divisors, whose sum is σ = 55156320. Its totient is φ = 55156318.

The previous prime is 55156273. The next prime is 55156349. The reversal of 55156319 is 91365155.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55156319 is a prime.

It is a super-2 number, since 2×55156319² = 6084439051259522, which contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55156349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27578159 + 27578160.

It is an arithmetic number, because the mean of its divisors is an integer number (27578160).

Almost surely, 2^55156319 is an apocalyptic number.

55156319 is a deficient number, since it is larger than the sum of its proper divisors (1).

55156319 is an equidigital number, since it uses as much as digits as its factorization.

55156319 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20250, while the sum is 35.

The square root of 55156319 is about 7426.7300341402. The cubic root of 55156319 is about 380.6551923889.

The spelling of 55156319 in words is "fifty-five million, one hundred fifty-six thousand, three hundred nineteen".