145415831 has 8 divisors (see below), whose sum is σ = 164106000. Its totient is φ = 127637440.

The previous prime is 145415827. The next prime is 145415863. The reversal of 145415831 is 138514541.

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

It is a cyclic number.

It is not a de Polignac number, because 145415831 - 2² = 145415827 is a prime.

It is a super-2 number, since 2×145415831² = 42291527810841122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145415891) 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, 227606 + ... + 228243.

It is an arithmetic number, because the mean of its divisors is an integer number (20513250).

Almost surely, 2^145415831 is an apocalyptic number.

145415831 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

145415831 is a deficient number, since it is larger than the sum of its proper divisors (18690169).

145415831 is a wasteful number, since it uses less digits than its factorization.

145415831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 455889.

The product of its digits is 9600, while the sum is 32.

The square root of 145415831 is about 12058.8486598016. The cubic root of 145415831 is about 525.8605159120.

The spelling of 145415831 in words is "one hundred forty-five million, four hundred fifteen thousand, eight hundred thirty-one".