151781941 has 4 divisors (see below), whose sum is σ = 155011392. Its totient is φ = 148552492.

The previous prime is 151781923. The next prime is 151781963. The reversal of 151781941 is 149187151.

It is a happy number.

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 151781941 - 2⁷ = 151781813 is a prime.

It is a super-2 number, since 2×151781941² = 46075515227454962, which contains 22 as substring.

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 151781941.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (151782941) 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, 1614655 + ... + 1614748.

It is an arithmetic number, because the mean of its divisors is an integer number (38752848).

Almost surely, 2^151781941 is an apocalyptic number.

It is an amenable number.

151781941 is a deficient number, since it is larger than the sum of its proper divisors (3229451).

151781941 is an equidigital number, since it uses as much as digits as its factorization.

151781941 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3229450.

The product of its digits is 10080, while the sum is 37.

The square root of 151781941 is about 12319.9813717392. The cubic root of 151781941 is about 533.4250019082.

The spelling of 151781941 in words is "one hundred fifty-one million, seven hundred eighty-one thousand, nine hundred forty-one".