1214251531 has 4 divisors (see below), whose sum is σ = 1243867464. Its totient is φ = 1184635600.

The previous prime is 1214251523. The next prime is 1214251579. The reversal of 1214251531 is 1351524121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1351524121 = 71 ⋅19035551.

It is a cyclic number.

It is not a de Polignac number, because 1214251531 - 2³ = 1214251523 is a prime.

It is a super-2 number, since 2×1214251531² = 2948813561071687922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1214251496 and 1214251505.

It is not an unprimeable number, because it can be changed into a prime (1214252531) 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, 14807905 + ... + 14807986.

It is an arithmetic number, because the mean of its divisors is an integer number (310966866).

Almost surely, 2^1214251531 is an apocalyptic number.

1214251531 is a deficient number, since it is larger than the sum of its proper divisors (29615933).

1214251531 is an equidigital number, since it uses as much as digits as its factorization.

1214251531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29615932.

The product of its digits is 1200, while the sum is 25.

The square root of 1214251531 is about 34846.1121360762. The cubic root of 1214251531 is about 1066.8488332214.

Adding to 1214251531 its reverse (1351524121), we get a palindrome (2565775652).

The spelling of 1214251531 in words is "one billion, two hundred fourteen million, two hundred fifty-one thousand, five hundred thirty-one".