155224042 has 8 divisors (see below), whose sum is σ = 246532356. Its totient is φ = 73046592.

The previous prime is 155224039. The next prime is 155224057. The reversal of 155224042 is 240422551.

It can be written as a sum of positive squares in 2 ways, for example, as 153289161 + 1934881 = 12381^2 + 1391^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 155223998 and 155224016.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2282673 + ... + 2282740.

Almost surely, 2^155224042 is an apocalyptic number.

155224042 is a deficient number, since it is larger than the sum of its proper divisors (91308314).

155224042 is a wasteful number, since it uses less digits than its factorization.

155224042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4565432.

The product of its (nonzero) digits is 3200, while the sum is 25.

The square root of 155224042 is about 12458.8940921737. The cubic root of 155224042 is about 537.4272244718.

Adding to 155224042 its reverse (240422551), we get a palindrome (395646593).

The spelling of 155224042 in words is "one hundred fifty-five million, two hundred twenty-four thousand, forty-two".