151204997 has 4 divisors (see below), whose sum is σ = 153461856. Its totient is φ = 148948140.

The previous prime is 151204951. The next prime is 151205027. The reversal of 151204997 is 799402151.

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, and also an emirpimes, since its reverse is a distinct semiprime: 799402151 = 59 ⋅13549189.

It is a cyclic number.

It is not a de Polignac number, because 151204997 - 2²⁰ = 150156421 is a prime.

It is a super-2 number, since 2×151204997² = 45725902235540018, 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 151204997.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (151201997) 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, 1128329 + ... + 1128462.

It is an arithmetic number, because the mean of its divisors is an integer number (38365464).

Almost surely, 2^151204997 is an apocalyptic number.

It is an amenable number.

151204997 is a deficient number, since it is larger than the sum of its proper divisors (2256859).

151204997 is an equidigital number, since it uses as much as digits as its factorization.

151204997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2256858.

The product of its (nonzero) digits is 22680, while the sum is 38.

The square root of 151204997 is about 12296.5441080004. The cubic root of 151204997 is about 532.7482698384.

The spelling of 151204997 in words is "one hundred fifty-one million, two hundred four thousand, nine hundred ninety-seven".