155520479 has 2 divisors, whose sum is σ = 155520480. Its totient is φ = 155520478.

The previous prime is 155520473. The next prime is 155520499. The reversal of 155520479 is 974025551.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 155520479 - 2⁸ = 155520223 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 (155520473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77760239 + 77760240.

It is an arithmetic number, because the mean of its divisors is an integer number (77760240).

Almost surely, 2^155520479 is an apocalyptic number.

155520479 is a deficient number, since it is larger than the sum of its proper divisors (1).

155520479 is an equidigital number, since it uses as much as digits as its factorization.

155520479 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 63000, while the sum is 38.

The square root of 155520479 is about 12470.7850193963. The cubic root of 155520479 is about 537.7691216935.

The spelling of 155520479 in words is "one hundred fifty-five million, five hundred twenty thousand, four hundred seventy-nine".