151021442 has 48 divisors (see below), whose sum is σ = 270371520. Its totient is φ = 62712000.

The previous prime is 151021441. The next prime is 151021447. The reversal of 151021442 is 244120151.

It is a happy number.

It is a super-3 number, since 3×151021442³ (a number of 26 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (151021441) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 561284 + ... + 561552.

It is an arithmetic number, because the mean of its divisors is an integer number (5632740).

Almost surely, 2^151021442 is an apocalyptic number.

151021442 is a deficient number, since it is larger than the sum of its proper divisors (119350078).

151021442 is a wasteful number, since it uses less digits than its factorization.

151021442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 459 (or 446 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 20.

The square root of 151021442 is about 12289.0781590809. The cubic root of 151021442 is about 532.5326063189.

Adding to 151021442 its reverse (244120151), we get a palindrome (395141593).

The spelling of 151021442 in words is "one hundred fifty-one million, twenty-one thousand, four hundred forty-two".