151029991 has 8 divisors (see below), whose sum is σ = 173097504. Its totient is φ = 129085440.

The previous prime is 151029979. The next prime is 151030007. The reversal of 151029991 is 199920151.

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

It is a cyclic number.

It is not a de Polignac number, because 151029991 - 2⁷ = 151029863 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 151029991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (151029091) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28090 + ... + 33031.

It is an arithmetic number, because the mean of its divisors is an integer number (21637188).

Almost surely, 2^151029991 is an apocalyptic number.

151029991 is a deficient number, since it is larger than the sum of its proper divisors (22067513).

151029991 is an equidigital number, since it uses as much as digits as its factorization.

151029991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61481.

The product of its (nonzero) digits is 7290, while the sum is 37.

The square root of 151029991 is about 12289.4259833403. The cubic root of 151029991 is about 532.5426546390.

The spelling of 151029991 in words is "one hundred fifty-one million, twenty-nine thousand, nine hundred ninety-one".