155487874 has 4 divisors (see below), whose sum is σ = 233231814. Its totient is φ = 77743936.

The previous prime is 155487859. The next prime is 155487877. The reversal of 155487874 is 478784551.

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., 149010849 + 6477025 = 12207^2 + 2545^2 .

It is a super-2 number, since 2×155487874² = 48352957922079752, which contains 22 as substring.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (155487877) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38871967 + ... + 38871970.

Almost surely, 2^155487874 is an apocalyptic number.

155487874 is a deficient number, since it is larger than the sum of its proper divisors (77743940).

155487874 is an equidigital number, since it uses as much as digits as its factorization.

155487874 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77743939.

The product of its digits is 1254400, while the sum is 49.

The square root of 155487874 is about 12469.4776955573. The cubic root of 155487874 is about 537.7315378164.

The spelling of 155487874 in words is "one hundred fifty-five million, four hundred eighty-seven thousand, eight hundred seventy-four".