155311442 has 64 divisors (see below), whose sum is σ = 285538176. Its totient is φ = 62415360.

The previous prime is 155311441. The next prime is 155311447. The reversal of 155311442 is 244113551.

It is a super-2 number, since 2×155311442² = 48243288032238728, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is not an unprimeable number, because it can be changed into a prime (155311441) by changing a digit.

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 in 31 ways as a sum of consecutive naturals, for example, 897668 + ... + 897840.

It is an arithmetic number, because the mean of its divisors is an integer number (4461534).

Almost surely, 2^155311442 is an apocalyptic number.

155311442 is a deficient number, since it is larger than the sum of its proper divisors (130226734).

155311442 is a wasteful number, since it uses less digits than its factorization.

155311442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 315.

The product of its digits is 2400, while the sum is 26.

The square root of 155311442 is about 12462.4011330080. The cubic root of 155311442 is about 537.5280729524.

Adding to 155311442 its reverse (244113551), we get a palindrome (399424993).

The spelling of 155311442 in words is "one hundred fifty-five million, three hundred eleven thousand, four hundred forty-two".