155230477 has 2 divisors, whose sum is σ = 155230478. Its totient is φ = 155230476.

The previous prime is 155230463. The next prime is 155230483. The reversal of 155230477 is 774032551.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 146385801 + 8844676 = 12099^2 + 2974^2 .

It is a cyclic number.

It is not a de Polignac number, because 155230477 - 2²⁷ = 21012749 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (155230447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77615238 + 77615239.

It is an arithmetic number, because the mean of its divisors is an integer number (77615239).

Almost surely, 2^155230477 is an apocalyptic number.

It is an amenable number.

155230477 is a deficient number, since it is larger than the sum of its proper divisors (1).

155230477 is an equidigital number, since it uses as much as digits as its factorization.

155230477 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 29400, while the sum is 34.

The square root of 155230477 is about 12459.1523387428. The cubic root of 155230477 is about 537.4346509339.

The spelling of 155230477 in words is "one hundred fifty-five million, two hundred thirty thousand, four hundred seventy-seven".