155274946 has 4 divisors (see below), whose sum is σ = 232912422. Its totient is φ = 77637472.

The previous prime is 155274919. The next prime is 155274947. The reversal of 155274946 is 649472551.

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

It can be written as a sum of positive squares in only one way, i.e., 152794321 + 2480625 = 12361^2 + 1575^2 .

It is a super-2 number, since 2×155274946² = 48220617710605832, which contains 22 as substring.

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

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38818735 + ... + 38818738.

Almost surely, 2^155274946 is an apocalyptic number.

155274946 is a deficient number, since it is larger than the sum of its proper divisors (77637476).

155274946 is an equidigital number, since it uses as much as digits as its factorization.

155274946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77637475.

The product of its digits is 302400, while the sum is 43.

The square root of 155274946 is about 12460.9368026646. The cubic root of 155274946 is about 537.4859658135.

The spelling of 155274946 in words is "one hundred fifty-five million, two hundred seventy-four thousand, nine hundred forty-six".