155351642 has 4 divisors (see below), whose sum is σ = 233027466. Its totient is φ = 77675820.

The previous prime is 155351629. The next prime is 155351659. The reversal of 155351642 is 246153551.

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., 148376761 + 6974881 = 12181^2 + 2641^2 .

It is a junction number, because it is equal to n+sod(n) for n = 155351599 and 155351608.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38837909 + ... + 38837912.

Almost surely, 2^155351642 is an apocalyptic number.

155351642 is a deficient number, since it is larger than the sum of its proper divisors (77675824).

155351642 is an equidigital number, since it uses as much as digits as its factorization.

155351642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77675823.

The product of its digits is 18000, while the sum is 32.

The square root of 155351642 is about 12464.0138799666. The cubic root of 155351642 is about 537.5744459351.

The spelling of 155351642 in words is "one hundred fifty-five million, three hundred fifty-one thousand, six hundred forty-two".