155274943 has 4 divisors (see below), whose sum is σ = 155306800. Its totient is φ = 155243088.

The previous prime is 155274919. The next prime is 155274947. The reversal of 155274943 is 349472551.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 155274943 - 2¹³ = 155266751 is a prime.

It is a super-2 number, since 2×155274943² = 48220615847306498, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 155274896 and 155274905.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155274947) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6918 + ... + 18931.

It is an arithmetic number, because the mean of its divisors is an integer number (38826700).

Almost surely, 2^155274943 is an apocalyptic number.

155274943 is a deficient number, since it is larger than the sum of its proper divisors (31857).

155274943 is an equidigital number, since it uses as much as digits as its factorization.

155274943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31856.

The product of its digits is 151200, while the sum is 40.

The square root of 155274943 is about 12460.9366822884. The cubic root of 155274943 is about 537.4859623520.

The spelling of 155274943 in words is "one hundred fifty-five million, two hundred seventy-four thousand, nine hundred forty-three".