155233501 has 2 divisors, whose sum is σ = 155233502. Its totient is φ = 155233500.

The previous prime is 155233493. The next prime is 155233541. The reversal of 155233501 is 105332551.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 131125401 + 24108100 = 11451^2 + 4910^2 .

It is a cyclic number.

It is not a de Polignac number, because 155233501 - 2³ = 155233493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (155233541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77616750 + 77616751.

It is an arithmetic number, because the mean of its divisors is an integer number (77616751).

Almost surely, 2^155233501 is an apocalyptic number.

It is an amenable number.

155233501 is a deficient number, since it is larger than the sum of its proper divisors (1).

155233501 is an equidigital number, since it uses as much as digits as its factorization.

155233501 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2250, while the sum is 25.

The square root of 155233501 is about 12459.2736947223. The cubic root of 155233501 is about 537.4381407809.

It can be divided in two parts, 1552 and 33501, that added together give a palindrome (35053).

The spelling of 155233501 in words is "one hundred fifty-five million, two hundred thirty-three thousand, five hundred one".