155002231 has 2 divisors, whose sum is σ = 155002232. Its totient is φ = 155002230.

The previous prime is 155002163. The next prime is 155002241. The reversal of 155002231 is 132200551.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-155002231 is a prime.

It is a super-2 number, since 2×155002231² = 48051383229954722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 155002199 and 155002208.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (155002241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77501115 + 77501116.

It is an arithmetic number, because the mean of its divisors is an integer number (77501116).

Almost surely, 2^155002231 is an apocalyptic number.

155002231 is a deficient number, since it is larger than the sum of its proper divisors (1).

155002231 is an equidigital number, since it uses as much as digits as its factorization.

155002231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 300, while the sum is 19.

The square root of 155002231 is about 12449.9891967825. The cubic root of 155002231 is about 537.1711127359.

Adding to 155002231 its reverse (132200551), we get a palindrome (287202782).

The spelling of 155002231 in words is "one hundred fifty-five million, two thousand, two hundred thirty-one".