151097381 has 8 divisors (see below), whose sum is σ = 155475480. Its totient is φ = 146734848.

The previous prime is 151097369. The next prime is 151097389. The reversal of 151097381 is 183790151.

It can be written as a sum of positive squares in 4 ways, for example, as 62568100 + 88529281 = 7910^2 + 9409^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-151097381 is a prime.

It is a super-2 number, since 2×151097381² = 45660837090118322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (151097389) 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, 17465 + ... + 24641.

It is an arithmetic number, because the mean of its divisors is an integer number (19434435).

Almost surely, 2^151097381 is an apocalyptic number.

It is an amenable number.

151097381 is a deficient number, since it is larger than the sum of its proper divisors (4378099).

151097381 is an equidigital number, since it uses as much as digits as its factorization.

151097381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7783.

The product of its (nonzero) digits is 7560, while the sum is 35.

The square root of 151097381 is about 12292.1674655042. The cubic root of 151097381 is about 532.6218501965.

The spelling of 151097381 in words is "one hundred fifty-one million, ninety-seven thousand, three hundred eighty-one".