151121553 has 16 divisors (see below), whose sum is σ = 221994432. Its totient is φ = 90680000.

The previous prime is 151121539. The next prime is 151121587. The reversal of 151121553 is 355121151.

It is a cyclic number.

It is not a de Polignac number, because 151121553 - 2⁵ = 151121521 is a prime.

It is a super-2 number, since 2×151121553² = 45675447562263618, which contains 22 as substring.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (151121513) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19338 + ... + 26003.

It is an arithmetic number, because the mean of its divisors is an integer number (13874652).

Almost surely, 2^151121553 is an apocalyptic number.

It is an amenable number.

151121553 is a deficient number, since it is larger than the sum of its proper divisors (70872879).

151121553 is a wasteful number, since it uses less digits than its factorization.

151121553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45456.

The product of its digits is 750, while the sum is 24.

The square root of 151121553 is about 12293.1506539211. The cubic root of 151121553 is about 532.6502509731.

The spelling of 151121553 in words is "one hundred fifty-one million, one hundred twenty-one thousand, five hundred fifty-three".