151012621 has 4 divisors (see below), whose sum is σ = 151174044. Its totient is φ = 150851200.

The previous prime is 151012597. The next prime is 151012639. The reversal of 151012621 is 126210151.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 126210151 = 10883 ⋅11597.

It can be written as a sum of positive squares in 2 ways, for example, as 47196900 + 103815721 = 6870^2 + 10189^2 .

It is a cyclic number.

It is not a de Polignac number, because 151012621 - 2¹³ = 151004429 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (151012021) 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, 79300 + ... + 81181.

It is an arithmetic number, because the mean of its divisors is an integer number (37793511).

Almost surely, 2^151012621 is an apocalyptic number.

It is an amenable number.

151012621 is a deficient number, since it is larger than the sum of its proper divisors (161423).

151012621 is an equidigital number, since it uses as much as digits as its factorization.

151012621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161422.

The product of its (nonzero) digits is 120, while the sum is 19.

The square root of 151012621 is about 12288.7192579211. The cubic root of 151012621 is about 532.5222378981.

Adding to 151012621 its reverse (126210151), we get a palindrome (277222772).

The spelling of 151012621 in words is "one hundred fifty-one million, twelve thousand, six hundred twenty-one".