155020469 has 2 divisors, whose sum is σ = 155020470. Its totient is φ = 155020468.

The previous prime is 155020447. The next prime is 155020499. The reversal of 155020469 is 964020551.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 119617969 + 35402500 = 10937^2 + 5950^2 .

It is a cyclic number.

It is not a de Polignac number, because 155020469 - 2⁸ = 155020213 is a prime.

It is a super-2 number, since 2×155020469² = 48062691617959922, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (155020499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77510234 + 77510235.

It is an arithmetic number, because the mean of its divisors is an integer number (77510235).

Almost surely, 2^155020469 is an apocalyptic number.

It is an amenable number.

155020469 is a deficient number, since it is larger than the sum of its proper divisors (1).

155020469 is an equidigital number, since it uses as much as digits as its factorization.

155020469 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10800, while the sum is 32.

The square root of 155020469 is about 12450.7216256729. The cubic root of 155020469 is about 537.1921802661.

The spelling of 155020469 in words is "one hundred fifty-five million, twenty thousand, four hundred sixty-nine".