151621123 has 2 divisors, whose sum is σ = 151621124. Its totient is φ = 151621122.

The previous prime is 151621117. The next prime is 151621177. The reversal of 151621123 is 321126151.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 151621123 - 2⁹ = 151620611 is a prime.

It is a super-2 number, since 2×151621123² = 45977929879562258, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 151621094 and 151621103.

It is not a weakly prime, because it can be changed into another prime (151621823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 75810561 + 75810562.

It is an arithmetic number, because the mean of its divisors is an integer number (75810562).

Almost surely, 2^151621123 is an apocalyptic number.

151621123 is a deficient number, since it is larger than the sum of its proper divisors (1).

151621123 is an equidigital number, since it uses as much as digits as its factorization.

151621123 is an evil number, because the sum of its binary digits is even.

The product of its digits is 360, while the sum is 22.

The square root of 151621123 is about 12313.4529275910. The cubic root of 151621123 is about 533.2365415060.

Adding to 151621123 its reverse (321126151), we get a palindrome (472747274).

The spelling of 151621123 in words is "one hundred fifty-one million, six hundred twenty-one thousand, one hundred twenty-three".