155405051 has 2 divisors, whose sum is σ = 155405052. Its totient is φ = 155405050.

The previous prime is 155405027. The next prime is 155405057. The reversal of 155405051 is 150504551.

It is a strong prime.

It is an emirp because it is prime and its reverse (150504551) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 155405051 - 2⁶ = 155404987 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 155405051.

It is not a weakly prime, because it can be changed into another prime (155405057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77702525 + 77702526.

It is an arithmetic number, because the mean of its divisors is an integer number (77702526).

Almost surely, 2^155405051 is an apocalyptic number.

155405051 is a deficient number, since it is larger than the sum of its proper divisors (1).

155405051 is an equidigital number, since it uses as much as digits as its factorization.

155405051 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2500, while the sum is 26.

The square root of 155405051 is about 12466.1562239529. The cubic root of 155405051 is about 537.6360438763.

The spelling of 155405051 in words is "one hundred fifty-five million, four hundred five thousand, fifty-one".