151801969 has 4 divisors (see below), whose sum is σ = 165602160. Its totient is φ = 138001780.

The previous prime is 151801939. The next prime is 151801973. The reversal of 151801969 is 969108151.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 151801969 - 2¹⁵ = 151769201 is a prime.

It is a super-2 number, since 2×151801969² = 46087675584553922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (151801919) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6900079 + ... + 6900100.

It is an arithmetic number, because the mean of its divisors is an integer number (41400540).

Almost surely, 2^151801969 is an apocalyptic number.

It is an amenable number.

151801969 is a deficient number, since it is larger than the sum of its proper divisors (13800191).

151801969 is a wasteful number, since it uses less digits than its factorization.

151801969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13800190.

The product of its (nonzero) digits is 19440, while the sum is 40.

The square root of 151801969 is about 12320.7941708317. The cubic root of 151801969 is about 533.4484631228.

The spelling of 151801969 in words is "one hundred fifty-one million, eight hundred one thousand, nine hundred sixty-nine".